CVE-2026-5091 Affecting libcatalyst-plugin-authentication-perl package, versions <0.10026-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LIBCATALYSTPLUGINAUTHENTICATIONPERL-16895022
- published27 May 2026
- disclosed21 May 2026
Introduced: 21 May 2026
CVE-2026-5091 (opens in a new tab)How to fix?
Upgrade Debian:unstable libcatalyst-plugin-authentication-perl to version 0.10026-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcatalyst-plugin-authentication-perl package and not the libcatalyst-plugin-authentication-perl package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Catalyst::Plugin::Authentication versions through 0.10024 for Perl is susceptible to timing attacks.
These versions use Perl's built-in eq comparison. Discrepencies in timing could be used to guess the underlying hash or password.
References
- https://security-tracker.debian.org/tracker/CVE-2026-5091
- https://github.com/perl-catalyst/Catalyst-Plugin-Authentication/commit/b0515f492257438cf07082acf1e10d06e8088a5e.patch
- https://metacpan.org/release/ETHER/Catalyst-Plugin-Authentication-0.10_025/changes
- http://www.openwall.com/lists/oss-security/2026/05/21/19