Description
Impact: Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype. The issue permits deletion of prototype properties but does not allow overwriting their original behavior. Patches: This issue is patched in 4.18.0. Workarounds: None. Upgrade to the patched version.
Problem types
CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Product status
4.17.23 (semver) before 4.18.0
4.18.0 (semver)
4.17.23 (semver) before 4.18.0
4.18.0 (semver)
4.17.23 (semver) before 4.18.0
4.18.0 (semver)
4.0.0 (semver) before 4.18.0
4.18.0 (semver)
Credits
Haruna38
shpik-kr
maru1009
ott3r07
zolbooo
backuardo
falsyvalues
jonchurch
jdalton
UlisesGascon
References
github.com/...lodash/security/advisories/GHSA-xxjr-mmjv-4gpg