CVE-2026-73297 Microsoft UFO: IPv6 transition address bypass of SSRF guard in URL validation
An unauthenticated attacker can bypass SSRF protections in Microsoft UFO by using IPv6 transition addresses to access internal services or cloud metadata.
- 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-2026-73297?
CVE-2026-73297 is a medium-severity server-side request forgery vulnerability in microsoft UFO, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, _is_blocked_ip in ufo/utils/url_security.py did not block NAT64 prefixes 64:ff9b::/96 and 64:ff9b:1::/48, the 6to4 prefix 2002::/16, or the Teredo prefix 2001::/32 and did not re-check embedded IPv4 destinations, allowing an unauthenticated remote attacker who can influence URLs processed by validate_url to bypass the SSRF guard and reach cloud metadata, internal services, or localhost. This issue is fixed in version 3.0.8.
Weakness: CWE-918
Which versions are affected by CVE-2026-73297?
How do I fix CVE-2026-73297?
No fix has been published for CVE-2026-73297 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-2026-73297 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73297 exists.
Sources
Also known as GHSA-7hrg-r8xr-p8gr.