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CVE-2026-104991

7.1 · HIGH

Phproject before 1.8.7 contains a missing object-level authorization vulnerability in the REST API issue endpoints (single_get, single_comments, single_comments_post) that allows authenticated API…

Published Oct 2, 2026CWE-862EPSS 0.32%

Overview

CVE-2026-104991 is a high-severity vulnerability. It was published on October 2, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Phproject before 1.8.7 contains a missing object-level authorization vulnerability in the REST API issue endpoints (single_get, single_comments, single_comments_post) that allows authenticated API key holders to bypass the security.restrict_access confidentiality control by never invoking the allowAccess() authorization routine. Attackers can use a valid API key to read restricted issue contents and comments, including owner and author email addresses, and post unauthorized comments to issues they should not have access to.

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/Alanaktion/phproject/releases/tag/v1.8.7GitHubgithub.com/Alanaktion/phproject/security/advisories/GHSA-mpq9-v47x-3hw8Refwww.vulncheck.com/advisories/phproject-missing-authorization-via-issues-rest-apiGitHubgithub.com/Alanaktion/phproject/security/advisories/GHSA-mpq9-v47x-3hw8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-104991?

CVE-2026-104991 is a high-severity vulnerability. It was published on October 2, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-104991?

This vulnerability has a CVSS 3.1 base score of 7.1, 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-2026-104991?

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-2026-104991?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-104991 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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