CVE-2026-40349: movary Auth Bypass — Exploit & Fix

Description

Movary is a self hosted web app to track and rate a user's watched movies. Prior to version 0.71.1, an ordinary authenticated user can escalate their own account to administrator by sending `isAdmin=true` to `PUT /settings/users/{userId}` for their own user ID. The endpoint is intended to let a user edit their own profile, but it updates the sensitive `isAdmin` field without any admin-only authorization check. Version 0.71.1 patches the issue.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

Affected Products

Vendor	Product	Versions
leepeuker	movary	< 0.71.1

References

Advisories & Patches

https://github.com/leepeuker/movary/commit/12c8a090051b1a1c07a3aa48922f3bc9ffe44c8b https://github.com/leepeuker/movary/pull/750 https://github.com/leepeuker/movary/security/advisories/GHSA-mcfq-8rx7-w25v

Exploits

https://github.com/leepeuker/movary/security/advisories/GHSA-mcfq-8rx7-w25v

Other References

https://github.com/leepeuker/movary/releases/tag/0.71.1

Frequently Asked Questions

What is CVE-2026-40349? +

Movary is a self hosted web app to track and rate a user's watched movies. Prior to version 0.71.1, an ordinary authenticated user can escalate their own account to administrator by sending `isAdmin=true` to `PUT /settings/users/{userId}` for their own user ID. The endpoint is intended to let a user edit their own profile, but it updates the sensitive `isAdmin` field without any admin-only authorization check. Version 0.71.1 patches the issue. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-40349? +

CVE-2026-40349 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40349? +

CVE-2026-40349 affects products from leepeuker, specifically: movary. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40349? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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