Bug 2477844 (CVE-2026-8503) - CVE-2026-8503 perl-Apache-Session-Browseable: perl-Apache-Session-Browseable: Predictable session IDs allow unauthorized system access
Summary: CVE-2026-8503 perl-Apache-Session-Browseable: perl-Apache-Session-Browseable:...
Keywords:
Status: NEW
Alias: CVE-2026-8503
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2477846 2477847
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-15 12:02 UTC by OSIDB Bzimport
Modified: 2026-05-15 12:25 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-05-15 12:02:13 UTC 
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.
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