🛡️ CVE-2025-40920

🟠 CVSS 8.6 — High ✅ No Known Exploit CWE-338 NVD
8.6
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl generate nonces using the Perl Data::UUID library.

  • Data::UUID does not use a strong cryptographic source for generating UUIDs.
  • Data::UUID returns v3 UUIDs, which are generated from known information and are unsuitable for security, as per RFC 9562.
  • The nonces should be generated from a strong cryptographic source, as per RFC 7616.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability low.

Weakness class

CVE-2025-40920 is classified as CWE-338: Use of Cryptographically Weak PRNG. A general-purpose random number generator is used where a cryptographic one is required.

Affected software

CVE-2025-40920 is recorded against 1 package.

  • unknown

Timeline and source

Published on 11 August 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

datatracker.ietf.org
datatracker.ietf.org
github.com
github.com
metacpan.org
security.metacpan.org
www.openwall.com

CVE-2025-40920 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 8.6
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
CWE CWE-338
Public Exploit ✅ No
Source NVD
Published 2025-08-11
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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