CVE-2026-81678 AVideo SSRF Guard Bypass via IPv6 Transition Addresses
Unauthenticated attackers can bypass SSRF protections in AVideo to access internal services and cloud metadata by exploiting IPv6 transition address formats.
- 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-2026-81678?
CVE-2026-81678 is a medium-severity server-side request forgery vulnerability in WWBN AVideo, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
AVideo before 24.0 contains a server-side request forgery vulnerability in the isSSRFSafeURL function that fails to extract embedded IPv4 addresses from NAT64, 6to4, and Teredo IPv6 transition address formats. Unauthenticated attackers can bypass SSRF protections via the LiveLinks proxy endpoint to reach internal services and cloud metadata endpoints by encoding private IPv4 targets in transition address formats.
Weakness: CWE-918
Which versions are affected by CVE-2026-81678?
How do I fix CVE-2026-81678?
No fix has been published for CVE-2026-81678 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-2026-81678 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-81678 exists.
Sources
Also known as GHSA-474r-333v-6p93, GHSA-pmq2-hv69-w45g.