What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-10-25
• Weakness: CWE-918

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

• samuelclay NewsBlur: before 14.5.0 — fixed in 14.5.0

How to fix

Upgrade to a fixed version: samuelclay NewsBlur 14.5.0. Check the vendor advisory for mitigations.

References

• https://github.com/samuelclay/NewsBlur/commit/2e6c6812c94f35a731bda864de5aef39f18307f1
• https://github.com/samuelclay/NewsBlur/commit/af742daeca7cc6c8b0d58cbea381e7bc44daa520
• https://github.com/samuelclay/NewsBlur/releases/tag/Android_14.5.0
• https://www.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-endpoint

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