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CVE-2026-100550— OpenClaw before 2026.8.1 Authentication Bypass via Access Group

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（npm 包）在 2026.8.1 之前的版本中，其 Microsoft Teams 集成存在访问控制绕过漏洞。当设置为白名单（allowlist）模式时，如果配置的访问组缺失或不受支持，会导致组解析结果为“拒绝”，但该拒绝结果并未被最终的消息准入检查机制所拦截。因此，即使管理员已设定了组边界限制，未列入白名单的 Microsoft Teams 成员仍可能触发已配置的 Agent。该漏洞的实际影响程度取决于该 Agent 可访问的对话内容、工具和数据范围。该问题已在版本 2026.8.1

CVSS 5.4 · Medium EPSS 0.19% · P8 Updated Sep 29, 2026

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 2

Vendor	Product	Version Range	Status
OpenClaw	OpenClaw	`< 2026.8.1`	affected
		`2026.8.1`	unaffected

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Vulnerability Title

OpenClaw before 2026.8.1 Authentication Bypass via Access Group

Source: CVE Program / CVE List V5

Vulnerability Description

OpenClaw (npm package 'openclaw') before 2026.8.1 contains an access-control bypass in the Microsoft Teams integration. When groupPolicy is set to allowlist, a missing or unsupported configured access group produces a denied group-resolution result that is not rejected by the final message-admission check, so a Teams member who is not on the allowlist can still trigger the configured agent despite the administrator's group boundary. The impact depends on the conversations, tools, and data available to that agent. The issue is fixed in version 2026.8.1.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制不正确

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
OpenClaw	OpenClaw	0 ~ 2026.8.1	-

II. Public POCs for CVE-2026-100550

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-100550

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Vendor Advisories for CVE-2026-100550 (2)

🔗 Microsoft Teams access-group failures could admit unlisted senders · Advisory · openclaw/openclaw · GitHub vendor-advisory
🔗 OpenClaw before 2026.8.1 Authentication Bypass via Access Group | Advisories | VulnCheck third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-100550

Same Patch Batch · OpenClaw · 2026-09-26 · 79 CVEs total

CVE-2026-100580	8.8 HIGH	OpenClaw before 2026.7.1 Remote Code Execution via cron tool
CVE-2026-100599	8.8 HIGH	OpenClaw 2026.5.1 before 2026.7.1 Remote Code Execution via googlemeet.chrome
CVE-2026-100575	8.8 HIGH	OpenClaw Slack before 2026.8.1 Authentication Bypass via Group DM
CVE-2026-100552	8.8 HIGH	OpenClaw before 2026.8.1 Policy Bypass via Native Tools
CVE-2026-100544	8.8 HIGH	openclaw voice-call before 2026.8.1 Authorization Bypass
CVE-2026-100586	8.8 HIGH	OpenClaw Codex before 2026.7.1 Authorization Bypass via Bind
CVE-2026-100587	8.8 HIGH	OpenClaw before 2026.7.1 Authorization Bypass via Codex Install
CVE-2026-100596	8.8 HIGH	OpenClaw before 2026.7.1 Authorization Bypass via MCP Configuration
CVE-2026-100589	8.3 HIGH	OpenClaw before 2026.7.1 Sandbox Bypass via Browser Node
CVE-2026-100568	8.3 HIGH	OpenClaw before 2026.8.1 Unauthorized Command Job Access
CVE-2026-100557	8.3 HIGH	OpenClaw before 2026.8.1 Authorization Bypass via Skill Tool Dispatch
CVE-2026-100588	8.3 HIGH	OpenClaw before 2026.7.1 Authentication Bypass via node.invoke
CVE-2026-100551	8.3 HIGH	OpenClaw iOS Control UI TLS Pin Enforcement Bypass
CVE-2026-100567	8.2 HIGH	OpenClaw before 2026.8.1 DNS Rebinding via CDP Hostname
CVE-2026-100532	8.1 HIGH	openclaw WhatsApp before 2026.8.1 Authentication Bypass
CVE-2026-100559	8.0 HIGH	OpenClaw before 2026.8.1 Command Injection via Escaped Newlines
CVE-2026-100585	8.0 HIGH	OpenClaw before 2026.7.1 Authentication Bypass via MCP Channel
CVE-2026-100561	8.0 HIGH	OpenClaw before 2026.8.1 Authentication Bypass via Exec Wrapper
CVE-2026-100597	7.8 HIGH	OpenClaw before 2026.7.1 Path Traversal via Filesystem Race
CVE-2026-100570	7.8 HIGH	OpenClaw before 2026.8.1 Remote Code Execution via CLOUDSDK_PYTHON_ARGS

Showing top 20 of 79 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: OpenClaw

Same vendor: OpenClaw

Same weakness: CWE-863

V. Comments for CVE-2026-100550

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-100550— OpenClaw before 2026.8.1 Authentication Bypass via Access Group

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 2

I. Basic Information for CVE-2026-100550

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-100550

III. Intelligence Information for CVE-2026-100550

Vendor Advisories for CVE-2026-100550 (2)

Same Patch Batch · OpenClaw · 2026-09-26 · 79 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-100550

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