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CVE-2026-91146

6.1 · MEDIUM

Takahe through 0.11.0 fails to restrict URL schemes in link hrefs within federated post content and profile summaries, allowing remote actors to inject javascript: links.

Published Sep 14, 2026CWE-79EPSS 0.34%

Overview

CVE-2026-91146 is a medium-severity vulnerability. It was published on September 14, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Takahe through 0.11.0 fails to restrict URL schemes in link hrefs within federated post content and profile summaries, allowing remote actors to inject javascript: links. Attackers can deliver federated content with malicious javascript: hrefs that execute in the instance origin when clicked, enabling session hijacking or impersonation of viewers.

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/jointakahe/takaheGitHubgithub.com/jointakahe/takahe/blob/0.11.0/core/html.pyGitHubgithub.com/jointakahe/takahe/issues/728Refwww.vulncheck.com/advisories/takahe-through-0.11.0-cross-site-scripting-via-javascript-url-scheme

How CyberStrike helps

Frequently asked questions

What is CVE-2026-91146?

CVE-2026-91146 is a medium-severity vulnerability. It was published on September 14, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-91146?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-91146?

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-2026-91146?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-91146 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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