# CVE-2026-25477: AFFiNE: Open Redirect via Regex Bypass in redirect-proxy

> Attackers can redirect users to malicious sites via a regex bypass in the redirect-proxy endpoint of the AFFiNE workspace application.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 2 Mar 2026
- **Updated:** 2 Mar 2026
- **Also known as:** GHSA-wx9m-v7wq-g289

## What is CVE-2026-25477?

CVE-2026-25477 is a medium-severity vulnerability in toeverything AFFiNE, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

AFFiNE is an open-source, all-in-one workspace and an operating system. Prior to version 0.26.0, there is an Open Redirect vulnerability located at the /redirect-proxy endpoint. The flaw exists in the domain validation logic, where an improperly anchored Regular Expression allows an attacker to bypass the whitelist by using malicious domains that end with a trusted string. This issue has been patched in version 0.26.0.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-25477?

It affects 1 product.


Products: Affine Affine.

## How do I fix CVE-2026-25477?

No fix has been published for CVE-2026-25477 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25477 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25477 exists.

## Other vulnerabilities in toeverything AFFiNE

- [CVE-2026-21853](https://insights.sbomify.com/CVE-2026-21853/): AFFiNE: One-click Remote Code Execution through Custom URL Handling (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25477 and fix it if it is affected.

What it is: CVE-2026-25477 is a medium-severity vulnerability in toeverything AFFiNE, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25477 exists.

Affected product: toeverything AFFiNE. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-25477/ (Markdown: https://insights.sbomify.com/CVE-2026-25477/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25477
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25477
- OSV: https://osv.dev/vulnerability/CVE-2026-25477

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25477/
Summaries are generated and may contain mistakes; the official description above is the record.