CVEvulnerability

CVE-2026-8503

6.5 MEDIUM Published 2026-05-15 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-05-15
Last modified
2026-10-26
Assigner
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-338, CWE-340

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.

Affected configurations

• guimard apache\ \ (< 1.3.19)

Related

Weakness · CWE (2)

  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) weakness
  • CWE-340 Generation of Predictable Numbers or Identifiers weakness

References