CVE-2026-8503 – Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids

CVE ID :CVE-2026-8503

Published : May 15, 2026, 12:17 p.m. | 1 hour, 41 minutes ago

Description :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.

Severity: 0.0 | NA

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