Auth bypass in Finsys Dockhand
CVE-2026-53988
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.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Finsys/dockhand/releases/tag/v1.0.40 (release-notes, patch)
- www.vulncheck.com/advisories/dockhand-unauthenticated-webhook-trigger-via-git-w… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53988?
- CVE-2026-53988 is a critical-severity vulnerability in Finsys Dockhand, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-09-29.
- How severe is CVE-2026-53988?
- Critical severity. CVSS v3 base score is 10.0 out of 10.