CVE-2026-58489

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.0, the GitHub Gist export flow created an OAuth2 state value but only checked that it was present rather than validating it against the value expected for the user's session. Because the state was not properly validated, an attacker could forge a callback URL containing their own valid GitHub OAuth code. When processing the callback, HedgeDoc used the victim's logged-in session to select which note to export, but the attacker's authorization code to determine which GitHub account received it. As a result, a logged-in victim who clicked a crafted link could export their own private, protected, or limited note directly into a Gist controlled by the attacker. This issue has been fixed in version 1.11.0.

CVSS

No CVSS.

References

Link	Resource
https://github.com/hedgedoc/hedgedoc/commit/fbd7307f162754212046ec343cbe691223a48c8d
https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-8v9p-5j95-826j

Configurations

No configuration.

History

13 Jul 2026, 23:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-13 23:16

Updated : 2026-07-14 16:42

NVD link : CVE-2026-58489

Mitre link : CVE-2026-58489

CVE.ORG link : CVE-2026-58489

JSON object : View

Products Affected

No product.

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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