CVE-2026-91146
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk9th 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.
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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

