CVE-2026-111172CWE-1321

CVE-2026-111172

Medium · published October 15, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
31.1
In the wild
Unconfirmed
What it is

@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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00383 · 31.1th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2026-10-15T23:17Z
References (5)
https://github.com/stalniy/casl · [email protected]https://github.com/stalniy/casl/blob/80f2380d03cfe9b162685d510ba8bc0ce83d0598/packages/casl-ability/src/utils.ts#L11-L29 · [email protected]https://github.com/stalniy/casl/commit/58242cb3c7911c8a89bacfb7d732701d81bc1324 · [email protected]https://github.com/stalniy/casl/pull/1305 · [email protected]https://www.vulncheck.com/advisories/casl-ability-6.7.5-before-7.0.2-prototype-pollution-via-rulestofields-setbypath · [email protected]
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 15 OCT 18:57Z
    @casl/ability 6.7.5 before 7.0.2 Prototype Pollution via rulesToFields setByPath
    cvelistv5
  • 15 OCT 18:57Z
    @casl/ability 6.7.5 before 7.0.2 Prototype Pollution via rulesToFields setByPath
    cvelistv5