CVE-2026-33580

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductOpenclaw

PublishedMar 31, 2026

First seenMar 31, 2026

Weakness typeCWE-307CWE-307

How to fix

Update

openclaw openclaw2026.3.28 or later
openclaw2026.3.28 or later

Patches

github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd

Vendor advisories

github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp

Affected products

Product	Affected versions	Fixed in
openclaw openclaw	v < 2026.3.28	2026.3.28
openclawnpm	v < 2026.3.28	2026.3.28

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