In short
- CVE-2026-90771 is a LOW (CVSS 3.7) vulnerability affecting joi.
- Chance of exploitation in the next 30 days (EPSS): 0.39%, higher than 33.0% of all vulnerabilities.
- Fix: update to 18.2.9, 17.13.8 or later.
| Package | Affected versions | Patched versions |
|---|
| joi npm | ≥ 18.0.0, < 18.2.9< 17.13.8
| 18.2.917.13.8
|
Description
joi before versions 17.13.8 and 18.2.9 contains a prototype pollution vulnerability in the messages compilation function that accepts proto as an error code. Attackers can supply proto keys in custom messages to replace the returned object's prototype, breaking downstream code relying on Object.prototype methods.
NVD description
joi before versions 17.13.8 and 18.2.9 contains a prototype pollution vulnerability in the messages compilation function that accepts __proto__ as an error code. Attackers can supply __proto__ keys in custom messages to replace the returned object's prototype, breaking downstream code relying on Object.prototype methods.
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