CVE-2026-102927

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data tampering.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-29 20:24 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-11-05 18:16 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-11-09 18:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 5.9 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-11-05 18:16 UTC

Last modified

2026-11-09 18:17 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-20 · Improper input validation

Record status

Received

Attack profile CVSS 4.0 · 5.9

Attack vector

Network

Complexity

Low

Attack requirements

Present

Privileges needed

Low

User interaction

Passive

Confidentiality

Low

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-102927.md and follow it. Check whether this project is affected by CVE-2026-102927. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge