CVE Catalog

CVE-2026-91146

MediumCVSS 6.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.19%

9th percentile - higher than 9% of all known CVEs

Summary

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.

Risk Assessment

A remote attacker can inject malicious javascript: links into federated content, which when clicked by a user can lead to session hijacking or user impersonation. This poses a serious threat to user account confidentiality and integrity.

Recommendation

Update Takahe to a version later than 0.11.0 that includes the fix. Until then, consider disabling federation or filtering content with javascript: links.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS