What is GHSA-x9vf-53q3-cvx6?

GHSA-x9vf-53q3-cvx6 is a security advisory published by GitHub Security Advisories with Critical severity. CASL Ability is Vulnerable to Prototype Pollution

Which CVE IDs does GHSA-x9vf-53q3-cvx6 cover?

GHSA-x9vf-53q3-cvx6 covers the following CVE IDs: CVE-2026-1774. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x9vf-53q3-cvx6?

GHSA-x9vf-53q3-cvx6 has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

Which products are affected by GHSA-x9vf-53q3-cvx6?

GHSA-x9vf-53q3-cvx6 affects 1 product, including: npm/@casl/ability:\u003e= 2.4.0, \u003c= 6.7.4.

GHSA-x9vf-53q3-cvx6CriticalCVSS 9.8

CASL Ability is Vulnerable to Prototype Pollution

Vendor

GitHub Security Advisories

Published

February 10, 2026

Last Modified

February 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-1774 →

📋 Description

CASL Ability, versions 2.4.0 through 6.7.4, contains a prototype pollution vulnerability.

🎯 Affected products1

npm/@casl/ability:>= 2.4.0, <= 6.7.4

🔗 References (8)

https://nvd.nist.gov/vuln/detail/CVE-2026-1774
https://cwe.mitre.org/data/definitions/1321.html
https://developer.mozilla.org/en-US/docs/Web/Security/Attacks/Prototype_pollution
https://github.com/stalniy/casl/tree/master/packages/casl-ability
https://www.kb.cert.org/vuls/id/458422
https://github.com/stalniy/casl/pull/1093
https://github.com/stalniy/casl/commit/39da920ec1dfadf3655e28bd0389e960ac6871f4
https://github.com/advisories/GHSA-x9vf-53q3-cvx6