CVE-2026-91146

MEDIUM 6.1

Takahe through 0.11.0 Cross-Site Scripting via javascript: URL Scheme

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	jointakahe
Product	takahe
Published	Sep 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

jointakahe / takahe

0 ≤ 0.11.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/jointakahe/takahe/issues/728 github.com: https://github.com/jointakahe/takahe github.com: https://github.com/jointakahe/takahe/blob/0.11.0/core/html.py vulncheck.com: https://www.vulncheck.com/advisories/takahe-through-0.11.0-cross-site-scripting-via-javascript-url-scheme

Credits

🔍 George Chen