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CVE

CVE-2026-35640

OpenClaw: Feishu webhook reads and parses unauthenticated request bodies before signature validation
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CVE

CVE-2026-35640

OpenClaw: Feishu webhook reads and parses unauthenticated request bodies before signature validation

Summary

Feishu webhook reads and parses unauthenticated request bodies before signature validation

Affected Packages / Versions

  • Package: openclaw
  • Affected versions: <= 2026.3.24
  • First patched version: 2026.3.25
  • Latest published npm version at verification time: 2026.3.24

Details

Feishu webhook handling previously parsed JSON before signature validation, which let unauthenticated callers force full JSON parsing work before rejection. Commit 5e8cb22176e9235e224be0bc530699261eb60e53 reads the raw request body, validates the signature first, and only then parses JSON.

Verified vulnerable on tag v2026.3.24 and fixed on main by commit 5e8cb22176e9235e224be0bc530699261eb60e53.

Fix Commit(s)

  • 5e8cb22176e9235e224be0bc530699261eb60e53

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
6.9
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456, https://nvd.nist.gov/vuln/detail/CVE-2026-35640, https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53, https://github.com/openclaw/openclaw, https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00127%
EPSS Percentile
0.31513%
Introduced Version
0
Fix Available
2026.3.28

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