CVE-2026-105633

{"id": "CVE-2026-105633", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-105633", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-05T18:21:45.443968Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.2, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "makeplane", "product": "plane", "versions": [{"status": "affected", "version": "< 1.4.0"}]}]}], "published": "2026-10-05T18:17:36.757", "references": [{"url": "https://github.com/makeplane/plane/commit/5829f0febf0739494d576b60d4943d10d236bc96", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/pull/9315", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/releases/tag/v1.4.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-639"}]}], "descriptions": [{"lang": "en", "value": "Plane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issue_id in the URL but omits it from the database query. A project member can use an issue_id they control in the URL while targeting another user's attachment by its pk UUID. Because the server matches only pk, workspace, and project_id, it modifies the attachment regardless of the issue_id in the URL. When the attachment is pending and has not been confirmed as uploaded, the PATCH handler sets created_by = request.user and transfers attachment ownership to the attacker. This issue is fixed in 1.4.0."}], "lastModified": "2026-10-05T19:17:17.213", "sourceIdentifier": "security-advisories@github.com"}