---
id: CVE-2026-91146
title: >-
  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
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:…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: jointakahe
product: takahe
affected:
  - takahe <= 0.11.0
published: '2026-09-14'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:47.773'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91146'
references:
  - url: 'https://github.com/jointakahe/takahe'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/jointakahe/takahe/blob/0.11.0/core/html.py'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/jointakahe/takahe/issues/728'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/takahe-through-0.11.0-cross-site-scripting-via-javascript-url-scheme
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00338
epssPercentile: 0.24426
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:14:22.823019Z'
ingestedAt: '2026-09-14T22:16:09.893Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.