GitHub Advisoryadvisory · PyPI
GHSA-869j-r97x-hx2g Anki's local HTTP server does not sufficiently validate requests
HIGH
Official page ↗
- Aliases
- CVE-2026-59153
- Ecosystem
- PyPI
- Packages
- aqt
- Severity
- High
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Weaknesses
- CWE-22, CWE-346
- Reviewed
- 2026-06-19
Affected packages
• PyPI aqt: < 25.9.3 → fixed in 25.9.3
Description
Summary
Anki launches a local HTTP server to serve media files and web pages for parts of its interface. While the server has a CORS setup, requests from other origins were not blocked, allowing malicious websites to potentially trigger side-effecting requests.
Browser impact
The severity varies by browser because of Private Network Access (PNA), a newer spec that restricts web pages from making requests to localhost/local network addresses:
Chrome/Chromium (including Edge, Brave): Largely protected, as Chrome has implemented PNA restrictions for several years and now puts local network access behind a permission prompt.
Safari: Hasn't implemented PNA yet, though macOS has some OS-level protections.
Firefox: Most vulnerable — hasn't implemented PNA yet, though it's reportedly planned for Firefox 151.
Patches
The issue was fixed as of Anki 25.09.3
References
https://x.com/taviso/status/2051310678800253318
Related
Alias · CVE (1)
- CVE-2026-59153 Anki is a program for creating and reviewing flashcards. vulnerability
References
- https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g web
- https://nvd.nist.gov/vuln/detail/CVE-2026-59153 advisory
- https://github.com/ankitects/anki/commit/858e5689d0e4fd24f74856c7e8f245412694a219 web
- https://github.com/ankitects/anki package
- https://github.com/ankitects/anki/releases/tag/25.09.3 web
- https://x.com/taviso/status/2051310678800253318 web