Vulnerability Details CVE-2026-21853
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 40.4%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-21853
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cpe:2.3:a:affine:affine:0.0.1
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cpe:2.3:a:affine:affine:0.10.0
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cpe:2.3:a:affine:affine:0.10.1
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cpe:2.3:a:affine:affine:0.10.2
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cpe:2.3:a:affine:affine:0.10.3
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cpe:2.3:a:affine:affine:0.10.4
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cpe:2.3:a:affine:affine:0.11.0
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cpe:2.3:a:affine:affine:0.11.1
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cpe:2.3:a:affine:affine:0.11.2
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cpe:2.3:a:affine:affine:0.11.3
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cpe:2.3:a:affine:affine:0.11.7
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cpe:2.3:a:affine:affine:0.11.8
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cpe:2.3:a:affine:affine:0.11.9
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cpe:2.3:a:affine:affine:0.12.0
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cpe:2.3:a:affine:affine:0.12.1
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cpe:2.3:a:affine:affine:0.12.2
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cpe:2.3:a:affine:affine:0.12.3
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cpe:2.3:a:affine:affine:0.13.0
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cpe:2.3:a:affine:affine:0.13.1
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cpe:2.3:a:affine:affine:0.13.2
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cpe:2.3:a:affine:affine:0.13.3
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cpe:2.3:a:affine:affine:0.13.4
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cpe:2.3:a:affine:affine:0.13.5
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cpe:2.3:a:affine:affine:0.14.0
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cpe:2.3:a:affine:affine:0.14.1
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cpe:2.3:a:affine:affine:0.14.2
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cpe:2.3:a:affine:affine:0.14.3
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cpe:2.3:a:affine:affine:0.14.4
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cpe:2.3:a:affine:affine:0.14.5
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cpe:2.3:a:affine:affine:0.14.6
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cpe:2.3:a:affine:affine:0.14.7
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cpe:2.3:a:affine:affine:0.14.8
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cpe:2.3:a:affine:affine:0.14.9
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cpe:2.3:a:affine:affine:0.15.0
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cpe:2.3:a:affine:affine:0.15.1
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cpe:2.3:a:affine:affine:0.15.2
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cpe:2.3:a:affine:affine:0.15.3
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cpe:2.3:a:affine:affine:0.15.4
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cpe:2.3:a:affine:affine:0.15.5
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cpe:2.3:a:affine:affine:0.15.6
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cpe:2.3:a:affine:affine:0.15.7
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cpe:2.3:a:affine:affine:0.15.8
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cpe:2.3:a:affine:affine:0.16.0
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cpe:2.3:a:affine:affine:0.16.1
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cpe:2.3:a:affine:affine:0.16.2
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cpe:2.3:a:affine:affine:0.16.3
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cpe:2.3:a:affine:affine:0.16.4
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cpe:2.3:a:affine:affine:0.17.0
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cpe:2.3:a:affine:affine:0.17.1
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cpe:2.3:a:affine:affine:0.17.2
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cpe:2.3:a:affine:affine:0.17.3
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cpe:2.3:a:affine:affine:0.17.4
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cpe:2.3:a:affine:affine:0.17.5
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cpe:2.3:a:affine:affine:0.18.0
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cpe:2.3:a:affine:affine:0.18.1
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cpe:2.3:a:affine:affine:0.18.2
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cpe:2.3:a:affine:affine:0.19.0
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cpe:2.3:a:affine:affine:0.19.1
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cpe:2.3:a:affine:affine:0.19.2
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cpe:2.3:a:affine:affine:0.19.3
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cpe:2.3:a:affine:affine:0.19.4
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cpe:2.3:a:affine:affine:0.19.5
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cpe:2.3:a:affine:affine:0.19.6
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cpe:2.3:a:affine:affine:0.20.0
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cpe:2.3:a:affine:affine:0.20.1
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cpe:2.3:a:affine:affine:0.20.2
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cpe:2.3:a:affine:affine:0.20.3
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cpe:2.3:a:affine:affine:0.20.4
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cpe:2.3:a:affine:affine:0.20.5
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cpe:2.3:a:affine:affine:0.21.0
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cpe:2.3:a:affine:affine:0.21.1
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cpe:2.3:a:affine:affine:0.21.2
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cpe:2.3:a:affine:affine:0.21.3
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cpe:2.3:a:affine:affine:0.21.4
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cpe:2.3:a:affine:affine:0.21.5
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cpe:2.3:a:affine:affine:0.21.6
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cpe:2.3:a:affine:affine:0.22.0
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cpe:2.3:a:affine:affine:0.22.1
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cpe:2.3:a:affine:affine:0.22.2
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cpe:2.3:a:affine:affine:0.22.3
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cpe:2.3:a:affine:affine:0.22.4
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cpe:2.3:a:affine:affine:0.22.5
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cpe:2.3:a:affine:affine:0.23.0
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cpe:2.3:a:affine:affine:0.23.1
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cpe:2.3:a:affine:affine:0.23.2
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cpe:2.3:a:affine:affine:0.23.3
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cpe:2.3:a:affine:affine:0.24.0
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cpe:2.3:a:affine:affine:0.24.1
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cpe:2.3:a:affine:affine:0.24.2
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cpe:2.3:a:affine:affine:0.24.3
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cpe:2.3:a:affine:affine:0.24.4
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cpe:2.3:a:affine:affine:0.25.0
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cpe:2.3:a:affine:affine:0.25.1
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cpe:2.3:a:affine:affine:0.25.2
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cpe:2.3:a:affine:affine:0.25.3
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cpe:2.3:a:affine:affine:0.5.1
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cpe:2.3:a:affine:affine:0.5.2
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cpe:2.3:a:affine:affine:0.5.3
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cpe:2.3:a:affine:affine:0.5.4
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cpe:2.3:a:affine:affine:0.6.0
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cpe:2.3:a:affine:affine:0.6.1
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cpe:2.3:a:affine:affine:0.6.2
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cpe:2.3:a:affine:affine:0.7.0
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cpe:2.3:a:affine:affine:0.7.1
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cpe:2.3:a:affine:affine:0.7.2
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cpe:2.3:a:affine:affine:0.7.3
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cpe:2.3:a:affine:affine:0.8.0
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cpe:2.3:a:affine:affine:0.8.1
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cpe:2.3:a:affine:affine:0.8.2
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cpe:2.3:a:affine:affine:0.8.3
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cpe:2.3:a:affine:affine:0.8.4
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cpe:2.3:a:affine:affine:0.9.0