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Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

golang.org/x/crypto/ssh/agent · CVE-2026-39833
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What is it?

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
9.1
EPSS
0.5%
First seen
1 d ago
Status
corroborated

All golang.org/x/crypto vulnerabilities