CVE-2026-42239

{"id": "CVE-2026-42239", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 1.7}]}, "published": "2026-05-07T20:16:44.097", "references": [{"url": "https://github.com/Budibase/budibase/releases/tag/3.35.10", "tags": ["Patch", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "security-advisories@github.com"}, {"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r", "tags": ["Vendor Advisory", "Exploit", "Mitigation"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1004"}]}], "descriptions": [{"lang": "en", "value": "Budibase is an open-source low-code platform. Prior to version 3.35.10, the budibase:auth cookie containing the JWT session token is set with httpOnly: false at packages/backend-core/src/utils/utils.ts:218. JavaScript can read this cookie via document.cookie. This means every XSS becomes a full account takeover \u2014 the attacker steals the JWT and has persistent access to the victim's account. The cookie also lacks secure: true (sent over plaintext HTTP) and sameSite attribute. This issue has been patched in version 3.35.10."}], "lastModified": "2026-06-04T16:10:31.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6D0CA7F-C1C1-4C1D-8A9D-0CB9D71CFDBE", "versionEndExcluding": "3.35.10"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}