CVE-2026-8503
6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploitability: 3.9 / Impact: 2.5
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
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 (1)
Related CWEs
CWE-338
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
CWE-340
Generation of Predictable Numbers or Identifiers
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
References (5)
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Patch
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Release Notes
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Product
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Third Party Advisory
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Third Party Advisory
Timeline
No history available yet.