CVE-2026-28449 OpenClaw < 2026.2.25 - Webhook Replay Attack via Missing Durable Replay Suppression
Attackers can replay valid signed webhook requests to trigger duplicate message processing, causing integrity and availability issues in OpenClaw.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-28449?
CVE-2026-28449 is a medium-severity vulnerability in Openclaw Openclaw, published on 19 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-294
Which versions are affected by CVE-2026-28449?
2 open source packages ship an affected version, including openclaw. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
openclaw npm | All versions | 2026.2.25 |
openclaw npm | All versions | 2026.2.25 |
Products include Openclaw Openclaw.
How do I fix CVE-2026-28449?
Upgrade openclaw to 2026.2.25 or later.
Is CVE-2026-28449 being exploited?
There is no known exploitation of CVE-2026-28449 in the wild and no public exploit code.
Other vulnerabilities in Openclaw Openclaw
- CVE-2026-28363 Security feature bypass in OpenClaw
- CVE-2026-30741 Code injection in n/a
- CVE-2026-33579 OpenClaw < 2026.3.28 - Privilege Escalation via Missing Caller Scope Validation in Device Pair Approval
- CVE-2026-32922 OpenClaw < 2026.3.11 - Privilege Escalation via Unvalidated Scope in device.token.rotate
- CVE-2026-32978 OpenClaw < 2026.3.11 - Approval Bypass via Unrecognized Script Runners
Sources
Also known as GHSA-r9q5-c7qc-p26w, MINI-g46r-8jfv-fq77.