CVE-2026-110254 Dockhand before 1.0.45 SSRF via IPv6 Transition Address Bypass in ipCategory
Authenticated attackers can bypass IP restrictions using IPv6 transition addresses to access internal services and cloud metadata.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110254?
CVE-2026-110254 is a medium-severity server-side request forgery vulnerability in Finsys dockhand, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Finsys Dockhand before 1.0.45 contains a server-side request forgery vulnerability in the ipCategory() function in src/lib/server/url-safety.ts, which fails to check NAT64, 6to4, and Teredo IPv6 transition ranges. Authenticated attackers can embed loopback, cloud metadata, or private IPv4 addresses in transition IPv6 literals within notification, backup, template, registry, git, or secret provider URLs to reach internal services.
Weakness: CWE-918
Which versions are affected by CVE-2026-110254?
How do I fix CVE-2026-110254?
No fix has been published for CVE-2026-110254 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-110254 being exploited?
There is no known exploitation of CVE-2026-110254 in the wild and no public exploit code.
Sources
Also known as GHSA-8rv7-48hx-jfw9, GHSA-hvwx-hhfv-4fvx.