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CVE-2026-21853 - Vulnerability Analysis

HighCVSS: 8.8

Last Updated: March 2, 2026

AFFiNE - Remote Code Execution

Published: March 2, 2026Updated: March 2, 2026Remote Exploitable

Overview

AFFiNE < 0.25.4 contains a remote code execution caused by processing specially crafted affine: URLs in the custom URL handler, letting attackers execute arbitrary code remotely via crafted links, exploit requires victim interaction or automatic redirect.

Severity & Score

Severity: High

CVSS Score: 8.8

Impact

Attackers can execute arbitrary code on victim machines remotely, leading to full system compromise.

Mitigation

Update to version 0.25.4 or later.

References

https://github.com/toeverything/AFFiNE/commit/c9a4129a3e9376b688c18e1dcd6c87a775caac80
https://github.com/toeverything/AFFiNE/pull/13864
https://github.com/toeverything/AFFiNE/security/advisories/GHSA-67vm-2mcj-8965

Related Resources

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Details

CVE ID: CVE-2026-21853
Severity: High
CVSS Score: 8.8
Type: remote_code_execution
Status: unconfirmed

CWE

CWE-94

CVSS Metrics

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