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Nokogiri before 1.19.1 Unchecked Return Value canonicalize

sparklemotion nokogiri · CVE-2026-79772
0 news outlets0 CERTs and agencies0 researchers

What is it?

Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the canonicalize method, returning an empty string on failure instead of raising an exception. Attackers can exploit this to bypass signature validation in downstream SAML libraries by providing invalid canonicalized XML that is incorrectly accepted as valid.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
5.3
EPSS
0.3%
First seen
2 d ago
Status
corroborated

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