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

高 7.5CVE-2026-35640 · GHSA-3h52-cx59-c456 · 09/04/2026 公開 · 17/06/2026 更新

要点

CVE-2026-35640 は openclaw (openclaw), openclaw に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.44%（全脆弱性の 38.0% より高い）。
対処：2026.3.25, 2026.3.28 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
openclaw openclaw	`< 2026.3.25`	`2026.3.25`
openclaw npm	`< 2026.3.28`	`2026.3.28`

概要

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

NVD の説明

OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through forced JSON parsing before signature rejection.