CVE-2026-25642
HedgeDoc security headers for uploaded files were not working
- State
- Published
- Severity
- 4.3 Medium
- Published
- Feb 6, 2026
- Updated
- Feb 6, 2026
- Reserved
- Feb 4, 2026
Description
HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.6, files served below the /uploads/ endpoint did not use a more strict security-policy. This resulted in a too open Content-Security-Policy and furthermore opened the possibility to host malicious interactive web content (such as fake login forms) using SVG files. This vulnerability is fixed in 1.10.6.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | GitHub_M |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
hedgedochedgedoc |
|
References
- https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-x74j-jmf9-534w
- https://github.com/hedgedoc/hedgedoc/commit/74daa0e7a1cbfafd9aeb255eaf064dfe47cd401c
- https://github.com/hedgedoc/hedgedoc/commit/b930fe04cee92cd4723044030bb59c36781c7137
- https://github.com/hedgedoc/hedgedoc/releases/tag/1.10.6
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