CVE-2026-58266

NameCVE-2026-58266
DescriptionAnki 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
anki (PTS)bullseye2.1.15+dfsg-3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ankisource(unstable)(unfixed)

Notes

https://github.com/ankitects/anki/security/advisories/GHSA-cw6h-ffmh-x6vh
Fixed by: https://github.com/ankitects/anki/commit/b2b68d829e853da51b5de8aad6c13b53e90bc20d (25.09.4)

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