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CVE-2026-28481— OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching

Quick assessment

Affected
OpenClaw OpenClaw
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenClaw是openclaw开源的一个智能人工助理。 OpenClaw 2026.2.1之前版本存在安全漏洞，该漏洞源于MS Teams附件下载器在收到401或403响应后重试下载时，会将授权承载令牌发送到与宽松的基于后缀的允许列表匹配的不受信任主机，可能导致令牌窃取。

CVSS 6.5 · Medium EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenClaw OpenClaw ≤ 2026.1.30 affected
2026.2.1 unaffected
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I. Basic Information for CVE-2026-28481

Vulnerability Information
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Vulnerability Title
OpenClaw < 2026.2.1 - Bearer Token Leakage via MS Teams Attachment Downloader Suffix Matching
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
OpenClaw 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenClaw是openclaw开源的一个智能人工助理。 OpenClaw 2026.2.1之前版本存在安全漏洞，该漏洞源于MS Teams附件下载器在收到401或403响应后重试下载时，会将授权承载令牌发送到与宽松的基于后缀的允许列表匹配的不受信任主机，可能导致令牌窃取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenClaw OpenClaw 0 ~ 2026.1.30 -

II. Public POCs for CVE-2026-28481

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III. Intelligence Information for CVE-2026-28481

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Patches & Fixes for CVE-2026-28481 (1)

Vendor Advisories for CVE-2026-28481 (2)

Same Patch Batch · OpenClaw · 2026-03-05 · 46 CVEs total

CVE-2026-28466 9.9 CRITICAL OpenClaw < 2026.2.14 - Remote Code Execution via Node Invoke Approval Bypass
CVE-2026-28470 9.8 CRITICAL OpenClaw < 2026.2.2 - Exec Allowlist Bypass via Command Substitution in Double Quotes
CVE-2026-28474 9.8 CRITICAL OpenClaw Nextcloud Talk < 2026.2.6 - Allowlist Bypass via actor.name Display Name Spoofing
CVE-2026-28391 9.8 CRITICAL OpenClaw < 2026.2.2 - Command Injection via cmd.exe Parsing Bypass in Allowlist Enforcemen
CVE-2026-28446 9.4 CRITICAL OpenClaw < 2026.2.1 - Inbound Allowlist Policy Bypass in voice-call Extension via Empty Ca
CVE-2026-29610 8.8 HIGH OpenClaw < 2026.2.14 - Command Hijacking via Unsafe PATH Handling
CVE-2026-28485 8.4 HIGH OpenClaw 2026.1.5 < 2026.2.12 - Missing Authentication in Browser Control HTTP Endpoints
CVE-2026-28463 8.4 HIGH OpenClaw < 2026.2.14 - Arbitrary File Read via Shell Expansion in Safe Bins Allowlist
CVE-2026-28451 8.3 HIGH OpenClaw < 2026.2.14 - SSRF via Feishu Extension Media Fetching
CVE-2026-28476 8.3 HIGH OpenClaw < 2026.2.14 - Server-Side Request Forgery in Tlon Extension Authentication
CVE-2026-28447 8.1 HIGH OpenClaw 2026.1.29-beta.1 < 2026.2.1 - Path Traversal in Plugin Installation via Package N
CVE-2026-28472 8.1 HIGH OpenClaw < 2026.2.2 - Device Identity Check Bypass in Gateway WebSocket Connect Handshake
CVE-2026-28473 8.1 HIGH OpenClaw < 2026.2.2 - Authorization Bypass via /approve Chat Command
CVE-2026-28458 8.1 HIGH OpenClaw 2026.1.20 < 2026.2.1 - Missing Authentication in Browser Relay /cdp WebSocket End
CVE-2026-28468 7.7 HIGH OpenClaw 2026.1.29-beta.1 < 2026.2.14 - Authentication Bypass in Sandbox Browser Bridge Se
CVE-2026-28393 7.7 HIGH OpenClaw 2.0.0-beta3 < 2026.2.14 - Arbitrary JavaScript Module Loading via Hook Transform
CVE-2026-28469 7.5 HIGH OpenClaw < 2026.2.14 - Cross-Account Policy Context Misrouting via Shared Webhook Path Amb
CVE-2026-28392 7.5 HIGH OpenClaw < 2026.2.14 - Privilege Escalation in Slack Slash Command Handler via Direct Mess
CVE-2026-28479 7.5 HIGH OpenClaw < 2026.2.15 - Cache Poisoning via Deprecated SHA-1 Hash in Sandbox Configuration
CVE-2026-29609 7.5 HIGH OpenClaw < 2026.2.14 - Denial of Service via Unbounded URL-backed Media Fetch

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: OpenClaw
Same vendor: OpenClaw
Same weakness: CWE-201

V. Comments for CVE-2026-28481

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