EUVD-2026-30536
GHSA-2c59-fqg7-rwrx
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionNVD
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids.
Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems.
Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module.
This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.
AnalysisAI
Weak session ID generation in Apache::Session::Generate::SHA256 for Perl allows session prediction and hijacking. All versions before 1.3.19 derive session identifiers from low-entropy sources (time, PID, rand, stringified hash ref), enabling remote unauthenticated attackers to predict valid session IDs and gain unauthorized access. …
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