CVE-2026-111172
@casl/ability 6.7.5 before 7.0.2 Prototype Pollution via rulesToFields setByPath
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
@casl/ability 6.7.5 before 7.0.2 contains a prototype pollution vulnerability in rulesToFields() that allows attackers to modify inherited builtins via dotted condition keys. Attackers controlling rule conditions can supply keys like 'toString.call' to alter shared builtin functions process-wide, causing denial of service for the Node.js process.
| CWE | CWE-1321 |
| Vendor | stalniy |
| Product | @casl/ability |
| Published | Oct 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
stalniy / @casl/ability
6.7.5 < 7.0.2
References
github.com: https://github.com/stalniy/casl/commit/58242cb3c7911c8a89bacfb7d732701d81bc1324 github.com: https://github.com/stalniy/casl/pull/1305 github.com: https://github.com/stalniy/casl/blob/80f2380d03cfe9b162685d510ba8bc0ce83d0598/packages/casl-ability/src/utils.ts#L11-L29 github.com: https://github.com/stalniy/casl vulncheck.com: https://www.vulncheck.com/advisories/casl-ability-6.7.5-before-7.0.2-prototype-pollution-via-rulestofields-setbypath
Credits
Zachariah Mithani