HOMEVULNERABILITIESCVE-2026-41405
HIGH

CVE-2026-41405

CWE-408Published: April 28, 2026· Updated: Apr 30, 2026

7.5
CVSS v3.1
EPSS:0.13%probability of exploitation in 30 daysPercentile:32.5th

Official Description

OpenClaw before 2026.3.31 parses MS Teams webhook request bodies before performing JWT validation, allowing unauthenticated attackers to trigger resource exhaustion. Remote attackers can send malicious Teams webhook payloads to exhaust server resources by bypassing authentication checks.

NVD Source

Technical Analysis

CVE-2026-41405 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

openclaw1 product
openclaw
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623
ADVISORYhttps://github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8
ADVISORYhttps://www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-ms-teams-webhook-body-parsing

All References (3)

→
https://github.com/openclaw/openclaw/commit/3834d47099dd13c8244ed6de8b9ea9855c553623Patch
→
https://github.com/openclaw/openclaw/security/advisories/GHSA-p464-m8x6-vhv8Vendor Advisory
→
https://www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-ms-teams-webhook-body-parsingThird Party Advisory

Quick Facts

CVE IDCVE-2026-41405
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-408
CISA KEVNo
EPSS (30d)0.13%
Affected1 vendor
PublishedApr 28, 2026

Related CVEs (CWE-408)

CVE-2026-3592
5.3
CVE-2026-41374
5.3
CVE-2026-41331
5.3

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-41405 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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