CVE-2026-59153 Anki's local HTTP server does not sufficiently validate requests
A malicious website can trigger side-effecting requests to Anki's local HTTP server due to insufficient origin validation, potentially modifying data or bypassing security controls.
- 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
- Available
What is CVE-2026-59153?
CVE-2026-59153 is a low-severity vulnerability in ankitects anki, published on 7 Jul 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
Anki is a program for creating and reviewing flashcards. Prior to 25.09.3, Anki launches a local HTTP server to serve media files and web pages for parts of its interface, but requests from other origins were not sufficiently blocked. A malicious website could potentially trigger side-effecting requests to the local server, with severity varying by browser depending on Private Network Access protections. This issue is fixed in version 25.09.3.
Weakness: CWE-346
Which versions are affected by CVE-2026-59153?
3 open source packages ship an affected version, including aqt.
| Package | Affected | Fixed in |
|---|---|---|
aqt PyPI | All versions | 25.9.3 |
aqt PyPI | All versions | 25.9.3 |
aqt PyPI | All versions | 25.9.3 |
How do I fix CVE-2026-59153?
Upgrade aqt to 25.9.3 or later.
Is CVE-2026-59153 being exploited?
There is no known exploitation of CVE-2026-59153 in the wild and no public exploit code.
Sources
Also known as GHSA-869j-r97x-hx2g, PYSEC-2026-3459, UBUNTU-CVE-2026-59153.