Vulnerability · Published Aug 27, 2026 · Assigned by VulnCheck

CVE-2026-81678AVideo SSRF Guard Bypass via IPv6 Transition Addresses

High 7.5

In plain English

A high-severity server-side request forgery in AVideo from WWBN. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 60.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
WWBN	AVideo	0 – before 24.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-474r-333v-6p93) vendor-advisory
VulnCheck Advisory: AVideo SSRF Guard Bypass via IPv6 Transition Addresses third-party-advisory