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CVE-2026-58266— Anki: User scripts in iframes have access to the internal Anki API

Quick assessment

Affected
ankitects anki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ankitects Anki是Ankitects团队开源的一个Anki的共享后端和web组件,以及Qt前端。 Ankitects Anki 25.09.4之前版本存在输入验证错误漏洞，该漏洞源于内部localhost API访问控制不当，可能导致恶意导入的卡片包利用iframe读取任意文件并泄露。

CVSS 6.5 · Medium EPSS 0.22% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
ankitects anki < 25.09.4 affected
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I. Basic Information for CVE-2026-58266

Vulnerability Information
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Vulnerability Title
Anki: User scripts in iframes have access to the internal Anki API
Source: CVE Program / CVE List V5
Vulnerability Description
Anki is a program for creating and reviewing flashcards. Prior to 25.09.4, Anki's webview-based pages communicate with the Rust backend using an internal localhost API, and user scripts included via iframes in the editor can access this API despite protections intended to block reviewer and editor scripts. A malicious imported card package with an embedded iframe can use exposed API methods such as getImageForOcclusion to read arbitrary files accessible to the Anki process and exfiltrate them over the network. This issue is fixed in version 25.09.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Ankitects Anki 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ankitects Anki是Ankitects团队开源的一个Anki的共享后端和web组件,以及Qt前端。 Ankitects Anki 25.09.4之前版本存在输入验证错误漏洞，该漏洞源于内部localhost API访问控制不当，可能导致恶意导入的卡片包利用iframe读取任意文件并泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ankitects anki < 25.09.4 -

II. Public POCs for CVE-2026-58266

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III. Intelligence Information for CVE-2026-58266

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Patches & Fixes for CVE-2026-58266 (1)

Vendor Advisories for CVE-2026-58266 (1)

Vendor Pages for CVE-2026-58266 (1)

IV. Related Vulnerabilities

Same product: anki
Same vendor: ankitects
Same weakness: CWE-346

V. Comments for CVE-2026-58266

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