CVE-2026-25642

Summary

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.

Affected Software

Weaknesses

• CWE-79: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

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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