Open Source Markdown Notes Application Vulnerability in HedgeDoc
CVE-2026-25642

4.3MEDIUM

Key Information:

Vendor

Hedgedoc

Status
Hedgedoc
Vendor
CVE Published:
6 February 2026

What is CVE-2026-25642?

HedgeDoc, a collaborative markdown notes application, had a vulnerability where files served from the /uploads/ endpoint prior to version 1.10.6 did not enforce a stringent security policy. This oversight led to an overly permissive Content-Security-Policy, allowing the potential hosting of malicious interactive web content, such as deceptive login forms via SVG files. The issue has been addressed in version 1.10.6, emphasizing the importance of implementing robust security measures to prevent exploitation.

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Affected Version(s)

hedgedoc < 1.10.6

References

https://github.com/hedgedoc/hedgedoc/security/advisories/...
x_refsource_CONFIRM
https://github.com/hedgedoc/hedgedoc/commit/74daa0e7a1cbf...
x_refsource_MISC
https://github.com/hedgedoc/hedgedoc/commit/b930fe04cee92...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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