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://nvd.nist.gov/vuln/detail/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