HedgeDoc up to 1.10.x GitHub Gist Export Flow state state issue

Summaryinfo

A vulnerability, which was classified as problematic, has been found in HedgeDoc up to 1.10.x. This impacts an unknown function of the component GitHub Gist Export Flow. This manipulation of the argument state causes state issue. This vulnerability is handled as CVE-2026-58489. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in HedgeDoc up to 1.10.x and classified as problematic. Affected by this vulnerability is an unknown functionality of the component GitHub Gist Export Flow. The manipulation of the argument state with an unknown input leads to a state issue vulnerability. The CWE definition for the vulnerability is CWE-371. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-58489 since 06/30/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.11.0 eliminates this vulnerability.

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Productinfo

Name

• HedgeDoc

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10

Website

• Product: https://github.com/hedgedoc/hedgedoc/

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