CVE-2026-33580

MEDIUM

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

Title source: cna
STIX 2.1

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)

Core 3
Core References
Third Party Advisory third-party-advisory
GitHub Security Advisory (GHSA-9528-x887-j2fp)
https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp
Third Party Advisory third-party-advisory
VulnCheck Advisory: OpenClaw < 2026.3.28 - Brute Force Attack via Missing Rate Limiting on Webhook Shared Secret Authentication
https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication

Scores

CVSS v3 6.5
EPSS 0.0037
EPSS Percentile 28.1%
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