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I. Basic Information for CVE-2026-21853
Vulnerability Information

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Vulnerability Title
AFFiNE: One-click Remote Code Execution through Custom URL Handling
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
AFFiNE.Pro 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AFFiNE.Pro是Toeverything开源的一个下一代知识库。 AFFiNE.Pro 0.25.4之前版本存在代码注入漏洞,该漏洞源于特制affine:URL可导致一键远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
toeverythingAFFiNE < 0.25.4 -
II. Public POCs for CVE-2026-21853
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III. Intelligence Information for CVE-2026-21853
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IV. Related Vulnerabilities
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