CVE-2026-21853Public exploitNetwork attack vector

Remote code execution via trusted-host file URL

Published Mar 2, 2026 · Updated Mar 2, 2026

Code injection in TOEVERYTHING AFFiNE before 0.25.4 allows remote attackers to execute local files via a crafted affine: URL. The hidden redirect-proxy accepts file URLs whose forged host passes its domain allowlist, then the Electron navigation handler sends the URL to shell.openExternal. A macOS user must visit an attacker-controlled page or activate a malicious link and approve the browser's AFFiNE protocol prompt; the resulting process runs with that user's privileges.

CVSS severity8.8
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in TOEVERYTHING AFFiNE before 0.25.4 allows remote attackers to execute local files via a crafted affine: URL. The hidden redirect-proxy accepts file URLs whose forged host passes its domain allowlist, then the Electron navigation handler sends the URL to shell.openExternal. A macOS user must visit an attacker-controlled page or activate a malicious link and approve the browser's AFFiNE protocol prompt; the resulting process runs with that user's privileges.

The record

CVE
CVE-2026-21853
Published
Mar 2, 2026
Updated
Mar 2, 2026
Vendor
TOEVERYTHING
Product
AFFiNE
Classifications
CWE-94, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.25.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOEVERYTHING · AFFiNEversion=< 0.25.4

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo