OpenClaw up to 2026.3.7 Microsoft Teams Plugin team/channel groupAllowFrom authorization

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in OpenClaw up to 2026.3.7 and classified as problematic. This vulnerability affects unknown code of the file team/channel of the component Microsoft Teams Plugin. Performing a manipulation of the argument groupAllowFrom results in authorization. This vulnerability is reported as CVE-2026-34509. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in OpenClaw up to 2026.3.7. This affects an unknown part of the file team/channel of the component Microsoft Teams Plugin. The manipulation of the argument groupAllowFrom with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality. The summary by CVE is:

OpenClaw before 2026.3.8 contains a sender allowlist bypass vulnerability in its Microsoft Teams plugin that allows unauthorized senders to bypass intended authorization checks. When a team/channel route allowlist is configured with an empty groupAllowFrom parameter, the message handler synthesizes wildcard sender authorization, permitting any sender in the matched team/channel to trigger replies in allowlisted Teams routes.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-34509 since 03/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available.

Upgrading to version 2026.3.8 eliminates this vulnerability. Applying the patch 88aee9161e0e6d32e810a25711e32a808a1777b2 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenClaw 2026.3.8
Patch: 88aee9161e0e6d32e810a25711e32a808a1777b2

Timelineinfo

03/30/2026 CVE reserved
03/31/2026 +1 days Advisory disclosed
03/31/2026 +0 days VulDB entry created
03/31/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-g7cr-9h7q-4qxq
Status: Confirmed

CVE: CVE-2026-34509 (🔒)
GCVE (CVE): GCVE-0-2026-34509
GCVE (VulDB): GCVE-100-354357

Entryinfo

Created: 03/31/2026 14:39
Changes: 03/31/2026 14:39 (80)
Complete: 🔍
Cache ID: 216::103

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