CVE-2026-53988: Dockhand < 1.0.40 Unauthenticated Webhook Trigger via Git Webhook Endpoints

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-29 · updated 2026-10-02
Weakness: CWE-306

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.

Affected products

Finsys dockhand: before 1.0.40 — fixed in 1.0.40

How to fix

Upgrade to a fixed version: Finsys dockhand 1.0.40. Check the vendor advisory for mitigations.

References

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