Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable with low privileges, but the CVSS 4.0 AT:P condition maps to AC:H in 3.1; no integrity or availability impact applies.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
OpenClaw versions before 2026.5.27 contain a token leakage vulnerability in MS Teams outbound requests that allows lower-trust callers to expose Bot Framework tokens. Attackers can access configured input paths to retrieve credentials that should remain within the trusted boundary.
AnalysisAI
Token leakage in OpenClaw's MS Teams integration (versions before 2026.5.27) allows lower-trust authenticated callers to retrieve Bot Framework tokens that should remain within the application's trusted boundary. Attackers exploit access to configured input paths involved in outbound MS Teams requests to harvest bearer tokens, which can then be used to authenticate to downstream Microsoft Bot Framework or Teams services as the compromised bot identity. No public exploit code exists and this vulnerability is not listed in CISA KEV, but the high confidentiality impact (VC:H) and credential theft potential make patching a priority for any organization running this integration.
Technical ContextAI
The affected component is the OpenClaw MS Teams integration module, identified by CPE cpe:2.3:a:openclaw:msteams:*:*:*:*:*:*:*:*. Bot Framework tokens are OAuth bearer tokens issued by Microsoft to authenticate bots against the Bot Framework service and MS Teams APIs - exposure of these tokens allows impersonation of the bot and unauthorized access to any service the bot identity is authorized to reach. The root cause is CWE-522 (Insufficiently Protected Credentials): the application fails to adequately protect these tokens from lower-trust callers when processing outbound MS Teams requests, making them accessible via configured input paths. The CVSS 4.0 AT:P metric (Attack Requirements: Present) indicates that a specific environmental or configuration condition must be met beyond simple authentication, consistent with the description's reference to 'configured input paths' as the access vector.
RemediationAI
Upgrade OpenClaw to version 2026.5.27 or later, which is the vendor-confirmed fixed release per the GitHub advisory at https://github.com/openclaw/openclaw/security/advisories/GHSA-v54h-q2vx-vgg4. After upgrading, rotate any Bot Framework tokens that may have been exposed - invalidating compromised credentials prevents post-exploitation use even if tokens were already harvested. If immediate upgrade is not feasible, restrict access to the configured input paths involved in MS Teams outbound request handling to fully-trusted callers only, using network-layer ACLs or application-level authorization controls; this reduces the lower-trust caller attack surface but does not eliminate the underlying credential protection flaw. Additional context from VulnCheck is available at https://www.vulncheck.com/advisories/openclaw-token-leakage-via-ms-teams-outbound-requests.
Auth bypass in OpenClaw voice-call extension before 2026.2.1. EPSS 0.68%. PoC and patch available.
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OpenClaw versions before 2026.2.26 allow authenticated attackers to write arbitrary files outside the workspace director
OpenClaw versions prior to 2026.2.22 contain a shell environment variable injection vulnerability in the system.run func
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OpenClaw versions prior to 2026.3.1 contain a sandbox escape vulnerability that allows authenticated attackers with low
OpenClaw versions 2026.1.30 and below fail to validate Telegram webhook secret tokens when `channels.telegram.webhookSec
Same weakness CWE-522 – Insufficiently Protected Credentials
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-45101
GHSA-q8cf-gmjr-64qh