CVE-2026-55160 Authenticated Server-Side Request Forgery (SSRF) via feed URL in Stringer
Authenticated users can exploit SSRF in Stringer to access internal networks and cloud metadata, potentially stealing credentials.
- 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-2026-55160?
CVE-2026-55160 is a high-severity server-side request forgery vulnerability in stringer-rss stringer, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Stringer is a self-hosted, anti-social RSS reader. Prior to commit 75cb095, an unrestricted Server-Side Request Forgery (SSRF) vulnerability allows any authenticated user to force the Stringer server to send arbitrary HTTP/HTTPS requests to internal networks, localhost services, and cloud metadata endpoints (e.g. AWS IMDS 169.254.169.254). When self-service signup is enabled (Setting::UserSignup), even a low-privileged registered user can exploit this to scan internal services or steal cloud IAM credentials. This issue has been patched via commit 75cb095.
Weakness: CWE-918
Which versions are affected by CVE-2026-55160?
How do I fix CVE-2026-55160?
No fix has been published for CVE-2026-55160 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-2026-55160 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55160 exists.
Sources
Also known as GHSA-496x-437q-h35q.