CVE-2026-2950
Last modified
CVE-2026-2950 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lodash | Lodash | >= 4.0.0, < 4.17.23 |
| Lodash | Lodash-Amd | >= 4.0.0, < 4.17.23 |
| Lodash | Lodash-Es | >= 4.0.0, < 4.17.23 |
| Lodash | Lodash.Unset | >= 4.0.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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