PT-2026-31355 · Npm · Openclaw

Published 2026-03-29 · Updated 2026-03-29

OSV

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

GHSA-3H52-CX59-C456

Affected Products

Openclaw

References · 6

• https://osv.dev/vulnerability/GHSA-3h52-cx59-c456 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35640 · Security Note
• https://github.com/openclaw/openclaw · Note
• https://github.com/openclaw/openclaw/security/advisories/GHSA-3h52-cx59-c456 · Note
• https://github.com/openclaw/openclaw/commit/5e8cb22176e9235e224be0bc530699261eb60e53 · Note
• https://vulncheck.com/advisories/openclaw-denial-of-service-via-unauthenticated-webhook-request-parsing · Note