CVE-2026-117563: MrDoc through 1.1.1 Broken Access Control via manage_doc_share

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-27 · updated 2026-10-27
Weakness: CWE-639

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.

Affected products

zmister2016 MrDoc: through 1.1.1

References

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

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