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Apache vulnerabilities

Every Apache vulnerability Vulnocalypse is tracking, newest first: whether it’s being exploited, which CERTs have warned about it and how widely it’s covered. Subscribe with the RSS feed for Apache alerts.

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  1. 81impact

    Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)

    Apache HTTP Server CVE-2021-42013
    Known exploited (KEV) (CISA)0 news outlets1 CERTs0 researchersCVSS 9.8
  2. 76impact

    Apache Struts 2.3.19 to 2.3.20.2, 2.3.21 to 2.3.24.1, and 2.3.25 to 2.3.28, when Dynamic Method Invocation is enabled, allow remote attackers to execute arbitra

    Apache Struts CVE-2016-3081
    Known exploited (KEV) (CISA)0 news outlets0 CERTs0 researchersCVSS 8.1
  3. 73impact

    Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Authenticated users could perform RCE via Jolokia MBeans

    Apache ActiveMQ CVE-2026-34197
    Known exploited (KEV) (CISA)0 news outlets1 CERTs0 researchersCVSS 8.8
  4. 42impact

    Apache Tomcat: Security constraints for default servlet ignored method

    Apache Tomcat CVE-2026-55956
    0 news outlets0 CERTs0 researchersCVSS 6.5
  5. 40impact

    Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled

    Apache Tomcat CVE-2026-34500
    0 news outlets0 CERTs0 researchersCVSS 6.5
  6. 43impact

    Apache Tomcat: Cloud membership for clustering component exposed the Kubernetes bearer token

    Apache Tomcat CVE-2026-34487
    0 news outlets0 CERTs0 researchersCVSS 7.5
  7. 44impact

    Apache Log4j 1 to Log4j 2 bridge: Silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters

    Apache Log4j CVE-2026-34479
    0 news outlets0 CERTs0 researchersCVSS 6.9
  8. 48impact

    Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

    Apache Tomcat CVE-2026-55957
    0 news outlets0 CERTs0 researchersCVSS 7.3
  9. 42impact

    Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

    Apache HTTP Server CVE-2026-34356
    0 news outlets0 CERTs0 researchersCVSS 7.5
  10. 31impact

    inets, httpd: Authentication Bypass via Directory Namespace Collapse in httpd mod_auth

    Apache HTTP Server CVE-2026-74994
    0 news outlets0 CERTs0 researchersCVSS 6.0
  11. 43impact

    Apache Tomcat: Incomplete escaping of JSON access logs

    Apache Tomcat CVE-2026-34483
    0 news outlets0 CERTs0 researchersCVSS 7.5
  12. 44impact

    Apache Tomcat: DoS via WebSocket chat example

    Apache Tomcat CVE-2026-66299
    0 news outlets0 CERTs0 researchersCVSS 7.5
  13. 74impact

    Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

    Apache Tomcat CVE-2026-34486
    Known exploited (KEV) (CISA)0 news outlets0 CERTs0 researchersCVSS 7.5
  14. 41impact

    Apache HTTP Server: Loop in `proxy_ftp_handler` in mod_proxy_ftp

    Apache HTTP Server CVE-2026-44186
    0 news outlets0 CERTs0 researchersCVSS 7.3
  15. 56impact

    Apache Tomcat: Authentication bypass when using Jakarta Authentication API

    Apache Tomcat CVE-2024-52316
    0 news outlets0 CERTs0 researchersCVSS 9.8
  16. 54impact

    Apache Tomcat: Digest authenticator will authenticate any unknown user

    Apache Tomcat CVE-2026-43512
    0 news outlets0 CERTs0 researchersCVSS 9.8
  17. 32impact

    Apache Tomcat: AJP secret compared in non-constant time

    Apache Tomcat CVE-2026-43514
    0 news outlets0 CERTs0 researchersCVSS 3.7
  18. 33impact

    Apache HTTP Server: mod_proxy_ftp XSS

    Apache HTTP Server CVE-2026-29170
    0 news outlets0 CERTs0 researchersCVSS 6.1
  19. 51impact

    Apache Tomcat: Security constraints not correctly applied

    Apache Tomcat CVE-2026-43515
    0 news outlets0 CERTs0 researchersCVSS 9.1
  20. 82impact

    Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT

    Apache Tomcat CVE-2025-24813
    Known exploited (KEV) (CISA)0 news outlets0 CERTs0 researchersCVSS 10.0
  21. 49impact

    Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector

    Apache Tomcat CVE-2026-53434
    0 news outlets0 CERTs0 researchersCVSS 9.1
  22. 41impact

    Apache Log4j Core: Missing TLS hostname verification in Socket appender

    Apache Log4j CVE-2025-68161
    0 news outlets0 CERTs0 researchersCVSS 6.3
  23. 44impact

    Apache Tomcat: Bad ornext processing in RewriteValve

    Apache Tomcat CVE-2026-53404
    0 news outlets0 CERTs0 researchersCVSS 7.3
  24. 42impact

    Apache HTTP Server: mod_proxy_html buffer overflow

    Apache HTTP Server CVE-2026-34355
    0 news outlets0 CERTs0 researchersCVSS 7.5
  25. 40impact

    curl curl: This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than w

    Apache HTTP Server CVE-2023-46218
    0 news outlets0 CERTs0 researchersCVSS 6.5
  26. 41impact

    Apache HTTP Server: mod_http2 memory corruption when file handles exhausted

    Apache HTTP Server CVE-2026-48913
    0 news outlets0 CERTs0 researchersCVSS 7.3
  27. 39impact

    Apache Tomcat: XSS in number guess example

    Apache Tomcat CVE-2026-50229
    0 news outlets0 CERTs0 researchersCVSS 6.1
  28. 49impact

    Apache Tomcat: Logged effective web.xml is incomplete

    Apache Tomcat CVE-2026-55276
    0 news outlets0 CERTs0 researchersCVSS 9.1
  29. 44impact

    Apache Tomcat: WebSocket authentication header exposure

    Apache Tomcat CVE-2026-42498
    0 news outlets0 CERTs0 researchersCVSS 7.3
  30. 49impact

    Apache HTTP Server: mod_http2 denial of service

    Apache HTTP Server CVE-2026-49975
    0 news outlets1 CERTs0 researchersCVSS 7.5
  31. 44impact

    Apache Tomcat: LockOutRealm treats user names as case-sensitive

    Apache Tomcat CVE-2026-43513
    0 news outlets0 CERTs0 researchersCVSS 7.5
  32. 40impact

    Apache Tomcat: EncryptInterceptor not protected against replay attacks

    Apache Tomcat CVE-2026-55955
    0 news outlets0 CERTs0 researchersCVSS 6.5
  33. 41impact

    Apache Tomcat: Security constraint bypass with HTTP/0.9

    Apache Tomcat CVE-2026-24733
    0 news outlets0 CERTs0 researchersCVSS 6.5
  34. 42impact

    inets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-Length

    Apache HTTP Server CVE-2026-73812
    0 news outlets0 CERTs0 researchersCVSS 8.3
  35. 45impact

    Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling

    Apache Tomcat CVE-2026-41284
    0 news outlets0 CERTs0 researchersCVSS 7.5
  36. 43impact

    inets,httpd:HTTP Request Smuggling via obs-fold Header Continuation

    Apache HTTP Server CVE-2026-66357
    0 news outlets0 CERTs0 researchersCVSS 8.3
  37. 47impact

    Apache Struts: File leak in multipart request processing causes disk exhaustion (DoS)

    Apache Struts CVE-2025-64775
    0 news outlets0 CERTs0 researchersCVSS 7.5
  38. 44impact

    inets,httpd: Memory Exhaustion via Unenforced max_body_size During Chunked Body Reception

    Apache HTTP Server CVE-2026-74835
    0 news outlets0 CERTs0 researchersCVSS 8.7
  39. 50impact

    Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled

    Apache Tomcat CVE-2026-86248
    0 news outlets0 CERTs0 researchersCVSS 9.8
  40. 48impact

    Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow

    Apache HTTP Server CVE-2026-44631
    0 news outlets0 CERTs0 researchersCVSS 9.8
  41. 39impact

    Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

    Apache HTTP Server CVE-2026-43951
    0 news outlets0 CERTs0 researchersCVSS 6.5
  42. 27impact

    Apache HTTP Server: escalation of privilege through expressions in .htaccess in multiple modules

    Apache HTTP Server CVE-2026-44119
    0 news outlets0 CERTs0 researchersCVSS 5.5
  43. 26impact

    Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper Limitation of a Pathname to a Restricted Classpath Directory

    Apache ActiveMQ CVE-2026-33227
    0 news outlets0 CERTs0 researchersCVSS 4.3
  44. 44impact

    Apache Log4j Core: Silent log event loss in XmlLayout due to unescaped XML 1.0 forbidden characters

    Apache Log4j CVE-2026-34480
    0 news outlets0 CERTs0 researchersCVSS 6.9
  45. 46impact

    Apache HTTP Server: mod_dav_fs protected directory access

    Apache HTTP Server CVE-2026-42535
    0 news outlets0 CERTs0 researchersCVSS 9.1
  46. 45impact

    Apache Tomcat: Request smuggling via invalid chunk extension

    Apache Tomcat CVE-2026-24880
    0 news outlets0 CERTs0 researchersCVSS 7.5
  47. 27impact

    Local privilege escalation with FileStore

    Apache Tomcat CVE-2022-23181
    0 news outlets0 CERTs0 researchers
  48. 44impact

    Apache Log4j Core: Log injection in Rfc5424Layout due to silent configuration incompatibility

    Apache Log4j CVE-2026-34478
    0 news outlets0 CERTs0 researchersCVSS 6.9
  49. 44impact

    Apache HTTP Server: mod_xml2enc heap overflow

    Apache HTTP Server CVE-2026-42536
    0 news outlets0 CERTs0 researchersCVSS 7.5
  50. 42impact

    Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Incorrect handling of TLSv1.3 KeyUpdate can be exploited to cause DoS via OOM

    Apache ActiveMQ CVE-2026-39304
    0 news outlets0 CERTs0 researchersCVSS 7.5
  51. 40impact

    Apache HTTP Server: Stack Buffer Over-Read in mod_ssl OCSP `send_request`

    Apache HTTP Server CVE-2026-44185
    0 news outlets0 CERTs0 researchersCVSS 7.3
  52. 78impact

    Apache ActiveMQ, Apache ActiveMQ Legacy OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attack

    Apache ActiveMQ CVE-2023-46604
    Known exploited (KEV) (CISA)0 news outlets0 CERTs0 researchersCVSS 10.0
  53. 32impact

    Apache Tomcat: Fix for CVE-2023-24998 is incomplete

    Apache Tomcat CVE-2023-28709
    0 news outlets0 CERTs0 researchers
  54. 49impact

    Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

    Apache Tomcat CVE-2025-31650
    0 news outlets0 CERTs0 researchersCVSS 7.5
  55. 36impact

    Apache HTTP Server: HTTP Response Splitting in multiple modules

    Apache HTTP Server CVE-2024-24795
    0 news outlets0 CERTs0 researchersCVSS 6.3
  56. 46impact

    Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation frames

    Apache HTTP Server CVE-2024-27316
    0 news outlets0 CERTs0 researchersCVSS 7.5
  57. 44impact

    Apache HTTP Server: HTTP response splitting

    Apache HTTP Server CVE-2023-38709
    0 news outlets0 CERTs0 researchersCVSS 7.3
  58. 52impact

    Apache HTTP Server may use exploitable/malicious backend application output to run local handlers via internal redirect

    Apache HTTP Server CVE-2024-38476
    0 news outlets0 CERTs0 researchersCVSS 9.8
  59. 44impact

    Apache HTTP Server: Crash resulting in Denial of Service in mod_proxy via a malicious request

    Apache HTTP Server CVE-2024-38477
    0 news outlets0 CERTs0 researchersCVSS 7.5
  60. 45impact

    Apache HTTP Server: mod_rewrite proxy handler substitution

    Apache HTTP Server CVE-2024-39573
    0 news outlets0 CERTs0 researchersCVSS 7.5
  61. 41impact

    Apache HTTP Server: NTLM Leakage on Windows through UNC SSRF

    Apache HTTP Server CVE-2025-59775
    0 news outlets0 CERTs0 researchersCVSS 7.5
  62. 29impact

    Apache HTTP Server: mod_userdir+suexec bypass via AllowOverride FileInfo

    Apache HTTP Server CVE-2025-66200
    0 news outlets0 CERTs0 researchersCVSS 5.4
  63. 40impact

    Apache HTTP Server: Server Side Includes adds query string to #exec cmd=...

    Apache HTTP Server CVE-2025-58098
    0 news outlets0 CERTs0 researchersCVSS 8.3
  64. 39impact

    Apache HTTP Server: mod_md (ACME), unintended retry intervals

    Apache HTTP Server CVE-2025-55753
    0 news outlets0 CERTs0 researchersCVSS 7.5
  65. 38impact

    Apache HTTP Server: CGI environment variable override

    Apache HTTP Server CVE-2025-65082
    0 news outlets0 CERTs0 researchersCVSS 6.5
  66. 48impact

    Apache HTTP Server: http2: double free and possible RCE on early reset

    Apache HTTP Server CVE-2026-23918
    0 news outlets1 CERTs0 researchersCVSS 8.8
  67. 32impact

    Oracle Corporation Oracle HTTP Server: Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Web Listener). The supported v

    Apache HTTP Server CVE-2026-91473
    0 news outlets0 CERTs0 researchersCVSS 7.8
  68. 42impact

    Oracle E-Business Suite: Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Oracle Weblogic Server Proxy Plu

    Apache HTTP Server CVE-2026-87346
    0 news outlets0 CERTs0 researchersCVSS 8.7
  69. 40impact

    Apache Log4j Core: verifyHostName attribute silently ignored in TLS configuration, allowing hostname verification bypass

    Apache Log4j CVE-2026-34477
    0 news outlets0 CERTs0 researchersCVSS 6.3
  70. 32impact

    Oracle Corporation Oracle HTTP Server: Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: OSSL Module). The supported ve

    Apache HTTP Server CVE-2026-91419
    0 news outlets0 CERTs0 researchersCVSS 7.8
  71. 40impact

    Oracle Corporation Oracle HTTP Server: Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: OSSL Module). Supported version

    Apache HTTP Server CVE-2026-87347
    0 news outlets0 CERTs0 researchersCVSS 9.6
  72. 48impact

    Apache HTTP Server: mod_ldap per-dir use-after-free

    Apache HTTP Server CVE-2026-29167
    0 news outlets0 CERTs0 researchersCVSS 9.8
  73. 30impact

    Apache Tomcat: Jasper JSTL <c:redirect> plug-in implementation omits page abort (SKIP_PAGE)

    Apache Tomcat CVE-2026-74049
    0 news outlets2 CERTs0 researchers
  74. 30impact

    Apache Tomcat: OpenSSL-FFM FIPS failure does not prevent start-up

    Apache Tomcat CVE-2026-74048
    0 news outlets2 CERTs0 researchers
  75. 29impact

    Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets - Fix for CVE-2026-65183 did not address APR connector

    Apache Tomcat CVE-2026-80353
    0 news outlets2 CERTs0 researchers
  76. 57impact

    Apache Tomcat: HTTP/2 request/response mix-up after error during async processing

    Apache Tomcat CVE-2026-101356
    0 news outlets3 CERTs0 researchersCVSS 9.1
  77. 57impact

    Apache Tomcat: AJP response mix-up

    Apache Tomcat CVE-2026-103119
    0 news outlets3 CERTs0 researchersCVSS 9.1
  78. 30impact

    Apache Tomcat: HTTP/2 trailer header cross-contamination

    Apache Tomcat CVE-2026-88041
    0 news outlets2 CERTs0 researchers
  79. 57impact

    Apache Tomcat: JNDIRealm bind credential validation fails open for non-GSSAPI SASL mechanisms

    Apache Tomcat CVE-2026-101296
    0 news outlets3 CERTs0 researchersCVSS 9.1
  80. 45impact

    trailing dot domain super cookie

    Apache HTTP Server CVE-2026-8924
    0 news outlets0 CERTs0 researchersCVSS 9.1
  81. 32impact

    Apache HTTP Server: DoS in HTTP/2 with initial windows size 0

    Apache HTTP Server CVE-2023-43622
    0 news outlets1 CERTs0 researchers
  82. 30impact

    Apache Tomcat: Possible TLS 1.3 connection failures

    Apache Tomcat CVE-2026-93446
    0 news outlets2 CERTs0 researchers
  83. 64impact

    SQL injection in JDBC Appender in Apache Log4j V1

    Apache Log4j CVE-2022-23305
    Public exploit code0 news outlets0 CERTs0 researchersCVSS 9.8
  84. 42impact

    Apache Tomcat: WebSocket DoS due to lost asynchronous write timeout

    Apache Tomcat CVE-2026-79677
    0 news outlets0 CERTs0 researchersCVSS 7.5
  85. 45impact

    Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset

    Apache Tomcat CVE-2026-68763
    0 news outlets0 CERTs0 researchersCVSS 7.5
  86. 42impact

    Apache Tomcat: AJP DoS via missing request body

    Apache Tomcat CVE-2026-78383
    0 news outlets0 CERTs0 researchersCVSS 7.5
  87. 48impact

    A deserialization flaw in the Chainsaw component of Log4j 1 can lead to malicious code execution.

    Apache Log4j CVE-2022-23307
    0 news outlets0 CERTs0 researchersCVSS 8.8
  88. 40impact

    Apache Tomcat: Cross-context authentication mix-up with Jakarta Authentication configured

    Apache Tomcat CVE-2026-75973
    0 news outlets0 CERTs0 researchersCVSS 7.3
  89. 40impact

    Apache Tomcat: Principal lookup can fail open in some cases

    Apache Tomcat CVE-2026-68569
    0 news outlets0 CERTs0 researchersCVSS 8.1
  90. 38impact

    Apache Log4j: Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connectio

    Apache Log4j CVE-2020-9488
    0 news outlets0 CERTs0 researchersCVSS 3.7
  91. 41impact

    Apache Log4j API: Improper serialization of non-finite floating-point values in MapMessage.asJson()

    Apache Log4j CVE-2026-49844
    0 news outlets0 CERTs0 researchersCVSS 6.3
  92. 42impact

    Apache Log4j JSON Template Layout: Improper serialization of non-finite floating-point values in JsonTemplateLayout

    Apache Log4j CVE-2026-34481
    0 news outlets0 CERTs0 researchersCVSS 6.3
  93. 44impact

    Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2

    Apache Log4j CVE-2021-4104
    0 news outlets0 CERTs0 researchersCVSS 7.5
  94. 85impact

    Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

    Apache Log4j CVE-2021-44228
    Known exploited (KEV) (CISA)0 news outlets0 CERTs1 researchersCVSS 10.0
  95. 48impact

    Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

    Apache Tomcat CVE-2026-68525
    0 news outlets0 CERTs0 researchersCVSS 9.1
  96. 56impact

    Apache Log4j: Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be explo

    Apache Log4j CVE-2019-17571
    0 news outlets0 CERTs0 researchersCVSS 9.8
  97. 48impact

    Apache Tomcat: EncryptInterceptor requirements not clearly documented

    Apache Tomcat CVE-2026-59084
    0 news outlets0 CERTs0 researchersCVSS 9.1
  98. 44impact

    Apache Tomcat: DoS via busy wait during WebSocket close

    Apache Tomcat CVE-2026-77791
    0 news outlets0 CERTs0 researchersCVSS 7.5
  99. 47impact

    Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass

    Apache Tomcat CVE-2026-59083
    0 news outlets0 CERTs0 researchersCVSS 9.1
  100. 49impact

    Apache Tomcat: Bypass longest prefix security constraint

    Apache Tomcat CVE-2026-65182
    0 news outlets0 CERTs0 researchersCVSS 9.1