CVE-2026-91146CWE-79cross-site-scripting

CVE-2026-91146

Medium · published September 15, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
26.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00338 · 26.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-15T02:16Z
References (4)
https://github.com/jointakahe/takahe · [email protected]https://github.com/jointakahe/takahe/blob/0.11.0/core/html.py · [email protected]https://github.com/jointakahe/takahe/issues/728 · [email protected]https://www.vulncheck.com/advisories/takahe-through-0.11.0-cross-site-scripting-via-javascript-url-scheme · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 21:45Z
    Takahe through 0.11.0 Cross-Site Scripting via javascript: URL Scheme
    cvelistv5