CVE-2026-53988 Dockhand < 1.0.40 Unauthenticated Webhook Trigger via Git Webhook Endpoints
Unauthenticated attackers can trigger arbitrary stack redeployments in Dockhand, potentially leading to denial of service or host compromise via malicious git branches.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53988?
CVE-2026-53988 is a critical authentication bypass vulnerability in Finsys dockhand, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Dockhand before 1.0.40 contains an authentication bypass vulnerability in its git webhook endpoints that allows unauthenticated remote attackers to trigger arbitrary stack redeployments by exploiting a null webhook secret guard condition. Attackers can enumerate sequential stack IDs and send unsigned webhook requests to force git clone and docker compose operations, enabling denial of service or, when combined with write access to the tracked git branch, container escape and full host compromise via attacker-controlled docker-compose.yml with privileged bind mounts.
Weakness: CWE-306
Which versions are affected by CVE-2026-53988?
How do I fix CVE-2026-53988?
No fix has been published for CVE-2026-53988 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-53988 being exploited?
There is no known exploitation of CVE-2026-53988 in the wild and no public exploit code.
Sources
Also known as GHSA-h855-x6jx-cfw2.