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TI-2026-41958 Aliases CVE-2026-58266

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

Priority LOW 28CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-346.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00221 12th percentileScored 2026-11-07
Fix Fixed anki (ankitects): 25.09.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Ankitectsankibefore 25.09.425.09.4Patch availableCNA
  • anki VendorAnkitects Affected before 25.09.4 Fixed in 25.09.4 Patch available CNA

Remediation

  • Fix · CNA anki (ankitects) Fixed in 25.09.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58266

References

Other 3

  • TI-2024-17117 Injection in Ankitects Anki CVSS 3.1CRITICAL 9.6
  • TI-2024-21378 Cross-site scripting in Ankitects Anki CVSS 3.1HIGH 8.2
  • TI-2024-19251 An vulnerability in the handling of Latex exists in Ankitects Anki 24.04. CVSS 3.1MEDIUM 6.5
  • TI-2024-21226 A blocklist bypass vulnerability exists in the LaTeX functionality of Ankitects Anki… CVSS 3.1MEDIUM 4.3
  • TI-2025-38504 Ankitects Anki before 25.02.5 allows a crafted shared deck on Windows to execute… CVSS 3.1HIGH 7.8
  • TI-2025-38503 Uncontrolled search path in Ankitects Anki CVSS 3.1HIGH 7.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences