🛡️ CVE-2026-8503
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-338 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE CWE-338
Public Exploit ✅ No
Source NVD
Published 2026-05-15
Updated 2026-06-02
Modified 2026-05-18

Affected Packages

Software From version Fixed in
apache\ — 1.3.19
unknown — —

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