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Permalink CVE-2026-28481
5.3 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): HIGH
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): NONE
  • Availability impact (A): NONE
updated 1 month, 3 weeks ago by @mweinelt Activity log
  • Created suggestion 1 month, 3 weeks ago
  • @mweinelt dismissed 1 month, 3 weeks ago
OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching

OpenClaw versions 2026.1.30 and earlier, contain an information disclosure vulnerability, patched in 2026.2.1, in the MS Teams attachment downloader (optional extension must be enabled) that leaks bearer tokens to allowlisted suffix domains. When retrying downloads after receiving 401 or 403 responses, the application sends Authorization bearer tokens to untrusted hosts matching the permissive suffix-based allowlist, enabling token theft.

Affected products

OpenClaw
  • =<2026.1.30

Matching in nixpkgs

pkgs.openclaw

Self-hosted, open-source AI assistant/agent

Package maintainers

Unaffected, never had 2026.2.1 or older.