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-2026-58486 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...

PT-2026-57919

Name of the Vulnerable Software and Affected Versions HedgeDoc versions prior to 1.11.0 Description Unsafe processing of note frontmatter allows a YAML alias bomb, where a compact malicious payload expands into a massive object structure. This occurs because the application uses js-yaml.load...