CVE-2026-104955

{"id": "CVE-2026-104955", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-104955", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-07T20:51:39.176412Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "makeplane", "product": "plane", "versions": [{"status": "affected", "version": "< 1.4.0"}]}]}], "published": "2026-10-05T17:17:10.970", "references": [{"url": "https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/pull/9014", "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-x63v-p7wc-47x4", "source": "security-advisories@github.com"}, {"url": "https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-269"}, {"lang": "en", "value": "CWE-285"}]}], "descriptions": [{"lang": "en", "value": "Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ to change another user's project role. The role-update logic blocks only a new role higher than the requester's role, so assigning the equal Member role bypasses the insufficient validation and promotes a Project Guest with role 5 to Member without Project Admin approval. This unauthorized promotion grants the guest the additional project capabilities associated with the Member role and allows a regular member to bypass project governance controls. This issue is fixed in 1.4.0."}], "lastModified": "2026-10-07T21:17:09.583", "sourceIdentifier": "security-advisories@github.com"}