CVE-2026-33580

Published: Mar 31, 2026

Modified: Mar 31, 2026

PUBLISHED

CVSS v3.1

6.5

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.

Vendor	Product	Versions
OpenClaw	OpenClaw	affected `0 - < 2026.3.28` unaffected `2026.3.28`

Weaknesses (CWE)

CWE-307

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

References

GitHub Security Advisory (GHSA-9528-x887-j2fp)

third-party-advisory

Patch Commit

patch

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

third-party-advisory

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CVE-2026-33580

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References