CVE-2026-85471 Quay: quay: webhook notification ssrf -- hostname-string blocklist trivially bypassable
An authenticated repository administrator can bypass hostname blocklists in webhook notifications to perform SSRF, potentially exposing sensitive internal service data.
- 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-2026-85471?
CVE-2026-85471 is a medium-severity server-side request forgery vulnerability in Red Hat Quay 3, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in Quay. An authenticated repository administrator could bypass the hostname blacklist in webhook notifications, leading to a Server-Side Request Forgery (SSRF) vulnerability. This allows the Quay application to be tricked into sending requests to internal network resources, such as cloud metadata services or other services within the cluster. Consequently, this could lead to the disclosure of sensitive information from these internal services.
Weakness: CWE-918
Which versions are affected by CVE-2026-85471?
How do I fix CVE-2026-85471?
No fix has been published for CVE-2026-85471 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-2026-85471 being exploited?
There is no known exploitation of CVE-2026-85471 in the wild and no public exploit code.
Sources
Also known as GHSA-f2g8-c8v2-qmmr.