OpenClaw < 2026.2.25 - Webhook Replay Attack via Missing Durable Replay Suppression
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-294.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenClaw | OpenClaw | before 2026.2.25 | 2026.2.25 | Patch available | CNA |
| — | openclaw (npm) | before 2026.2.25 | 2026.2.25 | Patch available | GHSA-r9q5-c7qc-p26w |
- OpenClaw VendorOpenClaw Affected before 2026.2.25 Fixed in 2026.2.25 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.2.25 Fixed in 2026.2.25 Patch available GHSA-r9q5-c7qc-p26w
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.2.25
- Fix · GHSA-r9q5-c7qc-p26w openclaw (npm) Fixed in 2026.2.25 Advisory →
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
OpenClaw 2026.2.25
5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-24554 OpenClaw < 2026.2.25 - Symlink Traversal in agents.files MethodsPriority MEDIUM 41
- TI-2026-24566 OpenClaw < 2026.2.25 - Password Brute-Force via Browser-Origin WebSocket Authentication BypassPriority LOW 35
- TI-2026-24547 OpenClaw < 2026.2.25 - Authorization Bypass in Interactive Callbacks via Sender Check SkipPriority LOW 33
Timeline
- 2026-10-02 Threatist record created from CVE-2026-28449
- 2026-10-03 Alias added: GHSA-r9q5-c7qc-p26w
References
More Openclaw vulnerabilities
- TI-2026-25309 OpenClaw < 2026.3.28 Media Parsing Path Traversal to Arbitrary File Read CVSS 4.0HIGH 8.7
- TI-2026-20394 Exposure of resource to wrong sphere in OpenClaw CVSS 3.1HIGH 8.8
- TI-2026-27742 OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation CVSS 4.0HIGH 8.4
- TI-2026-27766 OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing CVSS 4.0MEDIUM 6.9
- TI-2026-07315 OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentication CVSS 4.0MEDIUM 6.9
- TI-2026-17789 OpenClaw < 2026.2.22 - Allowlist Bypass via Command Substitution in system.run CVSS 4.0HIGH 7.5
Sources
- CVE-2026-28449 · CVE Program
- CVE-2026-28449 · NVD
- FIRST EPSS
- GHSA-r9q5-c7qc-p26w · GitHub Advisory Database · CC BY 4.0
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