{"id":"GHSA-7vwx-582j-j332","summary":"OpenClaw MS Teams inbound attachment downloader leaks bearer tokens to allowlisted suffix domains","details":"## Summary\n\nNOTE: This only affects deployments that enable the optional MS Teams extension (Teams channel). If you do not use MS Teams, you are not impacted.\n\nWhen OpenClaw downloads inbound MS Teams attachments / inline images, it may retry a URL with an `Authorization: Bearer \u003ctoken\u003e` header after receiving `401` or `403`.\n\nBecause the default download allowlist uses suffix matching (and includes some multi-tenant suffix domains), a message that references an untrusted but allowlisted host could cause that bearer token to be sent to the wrong place.\n\n## Affected Packages / Versions\n\n- Package: `openclaw` (npm)\n- Vulnerable: `\u003c= 2026.1.30`\n- Patched: `\u003e= 2026.2.1`\n\n## Fix\n\n- Fix commit: `41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b`\n- Upgrade to `openclaw \u003e= 2026.2.1`\n\n## Workarounds\n\n- If you do not need MS Teams, disable the MS Teams extension.\n- If you must stay on an older version, ensure the auth host allowlist is strict (only Microsoft-owned endpoints that require auth) and avoid wildcard or broad suffix entries.\n\n## Credits\n\nThanks @yueyueL for reporting.","aliases":["CVE-2026-28481"],"modified":"2026-03-06T01:17:23.703704Z","published":"2026-02-17T21:38:14Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-02-17T21:38:14Z","nvd_published_at":"2026-03-05T22:16:22Z","cwe_ids":["CWE-201"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-7vwx-582j-j332"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28481"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/commit/41cc5bcd4f1d434ad1bbdfa55b56f25025ecbf6b"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/releases/tag/v2026.2.1"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/openclaw-bearer-token-leakage-via-ms-teams-attachment-downloader-suffix-matching"}],"affected":[{"package":{"name":"openclaw","ecosystem":"npm","purl":"pkg:npm/openclaw"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.2.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-7vwx-582j-j332/GHSA-7vwx-582j-j332.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}