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Message-ID: <0642a5c4-b890-46a6-bed1-8e0ee95e5bfc@cpansec.org>
Date: Thu, 18 Jun 2026 18:54:16 +0100
From: Robert Rothenberg <rrwo@...nsec.org>
To: cve-announce@...urity.metacpan.org, oss-security@...ts.openwall.com
Subject: CVE-2026-9692: Mojolicious::Sessions::Storable versions through 0.05
for Perl generate session ids insecurely
========================================================================
CVE-2026-9692 CPAN Security Group
========================================================================
CVE ID: CVE-2026-9692
Distribution: Mojolicious-Plugin-SessionStore
Versions: through 0.05
MetaCPAN: https://metacpan.org/dist/Mojolicious-Plugin-SessionStore
VCS Repo: https://github.com/hayajo/Mojolicious-Plugin-SessionStore
Mojolicious::Sessions::Storable versions through 0.05 for Perl generate
session ids insecurely
Description
-----------
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.
Problem types
-------------
- CWE-340 Generation of Predictable Numbers or Identifiers
- CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator
Workarounds
-----------
Apply the patch, which requires an upgrade to Mojolicious 9.46 or
later.
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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