CVE-2026-33580 | OpenClaw up to 2026.3.27 Webhook Endpoint excessive authentication

VDB-354396 · CVE-2026-33580 · GCVE-0-2026-33580 OPENCLAW UP TO 2026.3.27 WEBHOOK ENDPOINT EXCESSIVE AUTHENTICATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.2 $0-$5k 2.37+ Summaryinfo A vulnerability classified as problematic was found in OpenClaw up to 2026.3.27. This impacts an unknown function of the component Webhook Endpoint. The manipulation results in excessive authentication. This vulnerability is identified as CVE-2026-33580. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised. Detailsinfo A vulnerability, which was classified as problematic, was found in OpenClaw up to 2026.3.27. Affected is an unknown function of the component Webhook Endpoint. The manipulation with an unknown input leads to a excessive authentication vulnerability. CWE is classifying the issue as CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. This is going to have an impact on confidentiality, and integrity. CVE summarizes: 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. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-33580 since 03/23/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1110.001. Upgrading to version 2026.3.28 eliminates this vulnerability. Productinfo Type Artificial Intelligence Software Name OpenClaw Version 2026.3.0 2026.3.1 2026.3.2 2026.3.3 2026.3.4 2026.3.5 2026.3.6 2026.3.7 2026.3.8 2026.3.9 2026.3.10 2026.3.11 2026.3.12 2026.3.13 2026.3.14 2026.3.15 2026.3.16 2026.3.17 2026.3.18 2026.3.19 2026.3.20 2026.3.21 2026.3.22 2026.3.23 2026.3.24 2026.3.25 2026.3.26 2026.3.27 Website Product: https://github.com/openclaw/openclaw/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 7.3 VulDB Meta Temp Score: 7.2 VulDB Base Score: 4.8 VulDB Temp Score: 4.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.8 CNA Vector (VulnCheck): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Excessive authentication CWE: CWE-307 / CWE-799 / CWE-400 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: OpenClaw 2026.3.28 Timelineinfo 03/23/2026 CVE reserved 03/31/2026 +7 days Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33580 (🔒) GCVE (CVE): GCVE-0-2026-33580 GCVE (VulDB): GCVE-100-354396 Entryinfo Created: 03/31/2026 16:58 Changes: 03/31/2026 16:58 (76) Complete: 🔍 Cache ID: 99:121:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸