CVE-2026-5091 (CVSS 5.1)

Description

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.

Is your site exposed to CVE-2026-5091?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.1

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-208 CWE-208

References

Other References

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

Frequently Asked Questions

What is CVE-2026-5091? +

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. It has a CVSS v3.1 base score of 5.1 (MEDIUM).

How severe is CVE-2026-5091? +

CVE-2026-5091 has a CVSS v3.1 score of 5.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-5091? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-75589

Net::OAuth versions before 0.33 for Perl check HMAC-SHA1, HMAC-SHA256 and PLAINTEXT signatures with a non-constant-time comparison in verify. Each of …

CVE-2026-15432

When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially …

CVE-2025-59432

SCRAM (Salted Challenge Response Authentication Mechanism) is part of the family of Simple Authentication and Security Layer (SASL, RFC 4422) …

CVE-2023-20540

An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash …

CVE-2023-20572

An observable timing discrepancy in the ASP could allow a privileged attacker to perform a brute-force attack against the hash …

CVE-2024-14041

In Bouncy Castle for Java from 1.73 to before 1.78, three ML-KEM (CRYSTALS-Kyber) routines divided secret-derived polynomial coefficients by the …

CVE-2026-5091