Dockhand < 1.0.40 Unauthenticated Webhook Trigger via Git Webhook Endpoints
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 · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA dockhand (Finsys) Fixed in 1.0.40
Timeline
- 2026-10-02 Threatist record created from CVE-2026-53988
- 2026-10-03 Alias added: GHSA-h855-x6jx-cfw2
References
More Finsys vulnerabilities
- TI-2026-73418 Authentication bypass in Finsys Dockhand via static-asset check CVSS 4.0CRITICAL 10.0
- TI-2026-73458 Server-side request forgery in Finsys Dockhand template endpoint CVSS 4.0HIGH 8.4
- TI-2026-84331 Secret disclosure in Dockhand via Git stack webhook CVSS 4.0HIGH 7.1
- TI-2026-76803 Dockhand Arbitrary File Read via /api/system/files/content CVSS 4.0HIGH 7.1
- TI-2026-73459 LDAP injection in Dockhand enables username enumeration CVSS 4.0MEDIUM 6.3
- TI-2026-75363 Unauthenticated command execution in Dockhand container terminal CVSS 3.1CRITICAL 9.6
Sources
- CVE-2026-53988 · CVE Program
- CVE-2026-53988 · NVD
- FIRST EPSS
- GHSA-h855-x6jx-cfw2 · GitHub Advisory Database · CC BY 4.0
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