CVE-2026-91146 Takahe through 0.11.0 Cross-Site Scripting via javascript: URL Scheme
Attackers can inject javascript: URLs into federated content, leading to session hijacking or impersonation when users click malicious links.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-91146?
CVE-2026-91146 is a medium-severity cross-site scripting vulnerability in jointakahe takahe, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-91146?
How do I fix CVE-2026-91146?
No fix has been published for CVE-2026-91146 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-91146 being exploited?
There is no known exploitation of CVE-2026-91146 in the wild and no public exploit code.
Sources
Also known as GHSA-p8xj-r4q8-q652.