Vulnerability · Published Jun 25, 2026 · Assigned by VulnCheck

CVE-2026-56771NewsBlur < 14.5.0 - Server-Side Request Forgery via add_url Endpoint

High 8.5

In plain English

A high-severity server-side request forgery in NewsBlur from samuelclay. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.4%top 71.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
samuelclay	NewsBlur	0 – before 14.5.0

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

References

Release Notes release-notes
Patch Commit (1) patch
Patch Commit (2) patch
https://www.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-endpoint third-party-advisory