{"id":"CVE-2026-100556","summary":"OpenClaw before 2026.8.1 Authentication Bypass via Session Reset","details":"OpenClaw (npm package openclaw) versions \u003e= 2026.5.2 and \u003c 2026.8.1 contain an incorrect authorization vulnerability in WhatsApp group handling. A group sender who is admitted for ordinary messages but denied by commands.allowFrom or owner command authorization can issue the /new \u003cmodel\u003e command to reset the shared group session and persist a provider and model override. This allows a command-denied group member to select a provider and model already permitted by the operator for subsequent turns in the shared group session, potentially changing provider routing, cost, data flow, or availability. It does not allow adding a new provider or host command execution. The issue is fixed in version 2026.8.1.","aliases":["GHSA-mm7m-wcgh-8mfq"],"modified":"2026-09-27T03:31:02.075381802Z","published":"2026-09-26T02:18:50.427Z","database_specific":{"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100556.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100556.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-mm7m-wcgh-8mfq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100556"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-authentication-bypass-via-session-reset"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openclaw/openclaw","events":[{"introduced":"8b2a6e57fef6c582ec6d27b85150616f9e3a7ba4"},{"fixed":"ea806575e6450e4d1efdfc72c19f04be982a1b9b"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2026.5.2"},{"fixed":"2026.8.1"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100556.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"}]}