Description
OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
Published: 2026-03-19
Score: 6.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Replay of signed webhook events leading to duplicate processing, potential data integrity loss, and service disruption
Action: Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r9q5-c7qc-p26w OpenClaw's Nextcloud Talk webhook replay could trigger duplicate inbound processing
History

Wed, 29 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 25 Mar 2026 15:00:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'}

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}


Thu, 19 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 19 Mar 2026 01:30:00 +0000

Type Values Removed Values Added
Description OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
Title OpenClaw < 2026.2.25 - Webhook Replay Attack via Missing Durable Replay Suppression
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-294
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


Subscriptions

Openclaw Openclaw
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-04-29T14:35:22.725Z

Reserved: 2026-02-27T19:16:50.224Z

Link: CVE-2026-28449

cve-icon Vulnrichment

Updated: 2026-03-19T17:05:04.089Z

cve-icon NVD

Status : Modified

Published: 2026-03-19T02:16:02.390

Modified: 2026-03-25T15:16:39.607

Link: CVE-2026-28449

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-25T11:51:34Z

Weaknesses