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CVE-2026-1774 — Vulnerability in @casl/ability — CVE Details

CRITICAL

CASL Ability is Vulnerable to Prototype Pollution

Published February 10, 2026Updated February 11, 2026Source: osv

Summary

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

Advisory Timeline

  • First published February 10, 2026 (244 days ago).
  • Last revised February 11, 2026 — 1 day after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

npm
Update @casl/ability to 6.7.5 or later
npm install @casl/ability@6.7.5

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: npm (1).

PackageEcosystemAffectedFixed In
@casl/ability
npm
All versions6.7.5

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-1321
    Prototype PollutionMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-1774?
CASL Ability is Vulnerable to Prototype Pollution This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-1774?
CVE-2026-1774 affects @casl/ability. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-1774 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-x9vf-53q3-cvx6

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