PT-2026-53769 · Pypi · Aqt

Published 2026-06-19 · Updated 2026-06-19

OSV

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Summary

Anki launches a local HTTP server to serve media files and web pages for parts of its interface. The server fails to validate requests in the following ways:

1. No sufficient validation of the Origin header.
2. Some endpoints are vulnerable to path traversal attacks.

This allows malicious websites to exfiltrate local files given a known path.

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

Fix

Origin Validation Error

Path traversal

Weakness Enumeration

CWE-346

CWE-22

Related Identifiers

GHSA-869J-R97X-HX2G

Affected Products

Aqt

References · 4

• https://osv.dev/vulnerability/GHSA-869j-r97x-hx2g · Vendor Advisory
• https://github.com/ankitects/anki · Note
• https://github.com/ankitects/anki/security/advisories/GHSA-869j-r97x-hx2g · Note
• https://x.com/taviso/status/2051310678800253318 · Note