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CVE-2026-62858

5.3 · MEDIUM

YOURLS is a self-hosted, customizable URL shortener written in PHP.

Published Oct 14, 2026CWE-98EPSS 0.47%

Overview

CVE-2026-62858 is a medium-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

YOURLS is a self-hosted, customizable URL shortener written in PHP. Prior to 1.10.5, yourls_get_request() extracted the request path without sanitization, after which yourls_sanitize_url() and yourls_esc_url() preserved dot and slash traversal sequences before an attacker-controlled keyword reached file_exists() and include() under YOURLS_PAGEDIR. An unauthenticated remote attacker could traverse outside the intended pages directory and include a local PHP file that was already present on the server, such as an uploaded or injected file, causing the file to execute in the YOURLS web process. This issue is fixed in version 1.10.5.

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/YOURLS/YOURLS/commit/4e85972160a96e03a419a442d5bd8f21f2f02ddbGitHubgithub.com/YOURLS/YOURLS/pull/4142GitHubgithub.com/YOURLS/YOURLS/releases/tag/1.10.5GitHubgithub.com/YOURLS/YOURLS/security/advisories/GHSA-f8ff-652m-j5rxGitHubgithub.com/YOURLS/YOURLS/security/advisories/GHSA-f8ff-652m-j5rx

How CyberStrike helps

Frequently asked questions

What is CVE-2026-62858?

CVE-2026-62858 is a medium-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-62858?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-62858?

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-2026-62858?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-62858 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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