CVE-2026-9692

Summary

Mojolicious::Sessions::Storable versions through 0.05 for Perl generate session ids insecurely.

The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, the heap address of an anonymous hash, and the PID.

These are predictable or low-entropy sources that are unsuitable for security purposes.

Affected Software

Weaknesses

• CWE-340: CWE-340 Generation of Predictable Numbers or Identifiers
• CWE-338: CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator

Workarounds

Apply the patch, which requires an upgrade to Mojolicious 9.46 or later.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://security.metacpan.org/patches/M/Mojolicious-Plugin-SessionStore/0.05/CVE-2026-9692-r1.patch
• https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-SessionStore-0.05/source/lib/Mojolicious/Sessions/Storable.pm#L11-15
• https://www.cve.org/CVERecord?id=CVE-2025-40923
• https://security.metacpan.org/docs/guides/random-data-for-security.html

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