ChangeIntel IT change radar

Public mode

No access to your tenant or devices. Every item links to its source. What this means

CVE-2026-90771

joi before 17.13.8 and 18.2.9 Prototype Pollution via messages

CVSS 4.0 6.3 MEDIUMCVSS 3.1 3.7 LOWCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-90771

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90771

Published

joi

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "hapijs",
                    "product": "joi",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/joi",
                    "versions": [
                        {
                            "version": "16.0.0",
                            "lessThan": "17.13.8",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "18.0.0",
                            "lessThan": "18.2.9",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON