CVE-2026-33580

MEDIUM

OpenClaw < 2026.3.28 - Brute Force Attack via Missing Rate Limiting on Webhook Shared Secret Authentication

Title source: cna

Description

OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets. Attackers who can reach the webhook endpoint can exploit this to forge inbound webhook events by repeatedly attempting authentication without throttling.

References (3)

[Third Party Advisory] https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp

[Patch] https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd

View Patch ZIP pw:eip

[Third Party Advisory] https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication

Scores

CVSS v3 6.5

EPSS 0.0008

EPSS Percentile 22.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-307

Status published

Products (4)

npm/openclaw 0 - 2026.3.28npm

OpenClaw/OpenClaw < 2026.3.28

openclaw/openclaw < 2026.3.28

OpenClaw/OpenClaw 2026.3.28

Published Mar 31, 2026

Tracked Since Mar 31, 2026