# CVE-2026-102927: HedgeDoc: Missing validation of incoming permission values on change

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.1, the WebSocket permission handler allows a note owner to store strings outside the supported freely, editable, limited, locked, protected, and private permission values. The viewing and editing checks handle only known values and can otherwise fall through to permissive behavior, making a note readable or writable more broadly than intended. SQLite deployments can persist the invalid value because the database column does not strictly enforce the set, while MySQL and PostgreSQL reject the database update but can leave the in-memory note state inconsistent for connected users until reload or cache eviction. Exploitation requires the note owner to intentionally submit an invalid permission value, and the owner could already choose a legitimate permissive setting, which limits the practical security impact. This issue is fixed in version 1.11.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- hedgedoc / hedgedoc: < 1.11.1 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 4.0: 5.9 (medium); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-20, CWE-284

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-93w7-49m2-cqwg (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/hedgedoc/hedgedoc/commit/0dda149c7f528a7e98a34a8459b7afb23c90a05b (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/hedgedoc/hedgedoc/releases/tag/1.11.1 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-102927; retrieved 2026-11-05; source updated 2026-11-05

Revision: f3f7384a46b296fb745d03e9ed88e2bce51f4343acfff49333779f966043264a

Canonical: https://y2.dev/cve/CVE-2026-102927

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