{"id":"CVE-2026-100555","summary":"OpenClaw before 2026.8.1 DNS Rebinding via attachment delivery","details":"OpenClaw is an npm-distributed gateway application. In versions \u003e= 2026.7.1 and \u003c 2026.8.1, Synology Chat attachment delivery could lose DNS pinning: the Gateway validated a single DNS result for a supplied file URL but then passed the original hostname to the Synology NAS, where it could resolve to a different destination. When attachment delivery accepted a remotely influenced hostname, an attacker could use DNS rebinding to make the NAS fetch a private or otherwise policy-denied resource and return its contents to the addressed conversation (server-side request forgery). Practical impact depends on NAS routing, resolver behavior, and the response available at the private destination. The issue is fixed in 2026.8.1; as a workaround, disable remote URL attachment forwarding in Synology Chat.","aliases":["GHSA-cf95-m4jv-59rc"],"modified":"2026-09-27T03:30:11.623534940Z","published":"2026-09-26T02:18:49.708Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100555.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100555.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-cf95-m4jv-59rc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100555"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-dns-rebinding-via-attachment-delivery"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openclaw/openclaw","events":[{"introduced":"2d2ddc43d0dcf71f31283d780f9fe9ff4cc04fe4"},{"fixed":"ea806575e6450e4d1efdfc72c19f04be982a1b9b"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"2026.7.1"},{"fixed":"2026.8.1"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100555.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N"}]}