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CVE-2026-56771

8.5 · HIGH

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…

Published Jun 25, 2026CWE-918EPSS 0.35%

Overview

CVE-2026-56771 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/samuelclay/NewsBlur/commit/2e6c6812c94f35a731bda864de5aef39f18307f1GitHubgithub.com/samuelclay/NewsBlur/commit/af742daeca7cc6c8b0d58cbea381e7bc44daa520GitHubgithub.com/samuelclay/NewsBlur/releases/tag/Android_14.5.0Refwww.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-endpoint

How CyberStrike helps

Frequently asked questions

What is CVE-2026-56771?

CVE-2026-56771 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

How severe is CVE-2026-56771?

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-56771?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-56771?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-56771 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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