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...

CVE-2026-58486

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58489 HedgeDoc: CSRF in GitHub Gist export callback

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...

EUVD-2026-43576

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...

CVE-2026-58489 HedgeDoc: CSRF in GitHub Gist export callback

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...

CVE-2026-58489 HedgeDoc: CSRF in GitHub Gist export callback

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...

CVE-2026-58489

HedgeDoc prior to v1.11.0 is vulnerable to a CSRF-like flaw in the GitHub Gist export callback. The OAuth2 state value was only checked for presence, not validated against the user session, allowing an attacker to craft a callback URL with their own valid GitHub OAuth code. When a logged-in victi...

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...

CVE-2026-58487

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a...

CVE-2026-58488

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Versions prior to 1.11.0 allowed attackers to circumvent the rate-limiting of the /login and /register routes by spoofing IP addresses. HedgeDoc instances checked for CloudFlare's cf-connecting-ip header and used th...

EUVD-2026-43572

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58486 HedgeDoc: Denial-of-service via YAML alias expansion in note frontmatter

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58486 HedgeDoc: Denial-of-service via YAML alias expansion in note frontmatter

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58486

CVE-2026-58486: HedgeDoc prior to 1.11.0 is vulnerable to a YAML alias bomb in note frontmatter. HedgeDoc parses frontmatter with js-yaml.load (js-yaml v3) via @hedgedoc/meta-marked, resolving YAML anchors and potentially expanding a malicious payload into a huge object, consuming CPU on each req...

CVE-2026-58486 HedgeDoc: Denial-of-service via YAML alias expansion in note frontmatter

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58486

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, HedgeDoc was vulnerable to a YAML alias bomb due to unsafe processing of the note frontmatter. HedgeDoc parsed frontmatter with js-yaml.load js-yaml v3 via @hedgedoc/meta-marked, which...

CVE-2026-58487 HedgeDoc: Stored HTML injection via email local-part

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a...

CVE-2026-58487 HedgeDoc: Stored HTML injection via email local-part

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a...

EUVD-2026-43552

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a...

CVE-2026-58487 HedgeDoc: Stored HTML injection via email local-part

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a...