🛡️ CVE-2026-58266 — aqt

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-22 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Anki: User scripts in iframes have access to the internal Anki API

Summary

Anki's webview-based pages communicate with the Rust backend using an internal localhost API. Anki implements measures to prevent user scripts run in the reviewer/editor from accessing this API (https://github.com/ankitects/anki/pull/3925) but it inadvertently allows access to scripts included via iframes in the editor. While overall only a limited set of API methods are exposed, some such as getImageForOcclusion can read arbitrary files.

CWE: CWE-22 (Path Traversal)

Reporter: Bankde (Eakasit)

Affected Products

| Ecosystem | Package | Affected Versions |

| --------- | ------- | ----------------- |

| PyPI | aqt | <= 25.09.3 |

Impact

Any desktop Anki user (Windows, macOS, Linux) who imports an untrusted .apkg and views card with an embedded iframe is vulnerable. No special configuration is required. The attacker can read any file accessible to the Anki process and exfiltrate its contents over the network.

Patches

A patch is available in 25.09.4

Workarounds

  • Do not import .apkg files from untrusted sources.
  • Inspect .apkg contents (it's a ZIP) for .html/.svg files with <script> tags before importing.
  • Block unexpected outbound network requests from the Anki process at the firewall level.

References

  • Vulnerability report: _Anki arbitrary file read vulnerability (with exfiltration)_ — Bankde (Eakasit)
  • Affected source: [qt/aqt/mediasrv.py::_handle_local_file_request](https://github.com/ankitects/anki/blob/5a9b54e9380c66e26391f0827867d2a728107836/qt/aqt/mediasrv.py#L223)
  • Related prior CVEs: [CVE-2024-29073](https://nvd.nist.gov/vuln/detail/CVE-2024-29073), [CVE-2024-32484](https://nvd.nist.gov/vuln/detail/CVE-2024-32484), [CVE-2025-62185](https://nvd.nist.gov/vuln/detail/CVE-2025-62185), [CVE-2025-62187](https://nvd.nist.gov/vuln/detail/CVE-2025-62187)

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-58266 is classified as CWE-22: Path Traversal. A file path built from user input is not confined to the intended directory, letting an attacker reach files elsewhere on the filesystem.

Affected software

CVE-2026-58266 is recorded against 2 packages.

  • aqt (fixed in 25.9.4)
  • unknown

Timeline and source

Published on 19 June 2026 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
github.com (Package)

Details

Severity Medium
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2026-06-19
Updated 2026-08-12
Modified 2026-07-08
Fix URL N/A

Affected Packages

Software From version Fixed in
aqt — 25.9.4
unknown — —

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