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Description

AFFiNE is an open-source, all-in-one workspace and an operating system. Prior to version 0.25.4, there is a one-click remote code execution vulnerability. This vulnerability can be exploited by embedding a specially crafted affine: URL on a website. An attacker can trigger the vulnerability in two common scenarios: 1/ A victim visits a malicious website controlled by the attacker and the website redirect to the URL automatically, or 2/ A victim clicks on a crafted link embedded on a legitimate website (e.g., in user-generated content). In both cases, the browser invokes AFFiNE custom URL handler, which launches the AFFiNE app and processes the crafted URL. This results in arbitrary code execution on the victim’s machine, without further interaction. This issue has been patched in version 0.25.4.

PUBLISHED Reserved 2026-01-05 | Published 2026-03-02 | Updated 2026-03-02 | Assigner GitHub_M




HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< 0.25.4
affected

References

github.com/...AFFiNE/security/advisories/GHSA-67vm-2mcj-8965

github.com/toeverything/AFFiNE/pull/13864

github.com/...ommit/c9a4129a3e9376b688c18e1dcd6c87a775caac80

cve.org (CVE-2026-21853)

nvd.nist.gov (CVE-2026-21853)

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