CVE-2026-56771 NewsBlur < 14.5.0 - Server-Side Request Forgery via add_url Endpoint
Authenticated users can exploit an SSRF flaw in NewsBlur to access internal networks and cloud metadata, leading to sensitive data exfiltration.
- 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-2026-56771?
CVE-2026-56771 is a medium-severity server-side request forgery vulnerability in samuelclay NewsBlur, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.
Weakness: CWE-918
Which versions are affected by CVE-2026-56771?
How do I fix CVE-2026-56771?
No fix has been published for CVE-2026-56771 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-2026-56771 being exploited?
There is no known exploitation of CVE-2026-56771 in the wild and no public exploit code.
Sources
Also known as GHSA-hggv-jxwf-w664.