CVE-2025-40920 Catalyst::Authentication::Credential::HTTP versions 1.018 and earlier for Perl use insecurely generated nonces
Attackers can predict HTTP authentication nonces due to weak UUID generation, potentially bypassing authentication mechanisms in Perl applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-40920?
CVE-2025-40920 is a high-severity vulnerability in ETHER Catalyst::Authentication::Credential::HTTP, published on 11 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-40920?
How do I fix CVE-2025-40920?
Upgrade to a fixed version.
Is CVE-2025-40920 being exploited?
There is no known exploitation of CVE-2025-40920 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-40920, GHSA-5xmm-95mj-42h8, UBUNTU-CVE-2025-40920.