CVE-2026-46488: Auth Bypass

Description

motionEye (mEye) is an online interface for a piece of software called "motion," which is a video surveillance program with motion detection. Prior to 0.44.0, motionEye accepts the client-controlled meye_username and meye_password_hash cookies as authentication material without server-side session validation. An unauthenticated attacker who knows a target username and corresponding hash can set the cookies manually or cause them to be loaded by submitting blank credentials through the switch-user authentication flow, after which the server authenticates the attacker as that user. The administrator username and password-hash value are stored in /etc/motioneye/motion.conf, which is globally readable by default, allowing a local shell user to obtain reusable administrator credential material. Successful impersonation can enable account lockout, password changes and persistence, data enumeration, data destruction, and data exfiltration. This issue is fixed in version 0.44.0.

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Weakness Type (CWE)

CWE-256 CWE-256

CWE-287 Improper Authentication

CWE-328 CWE-328

CWE-836 CWE-836

References

Other References

https://github.com/motioneye-project/motioneye/commit/0d5cb9c238a87447dae29812e5bf2ccf323cf3dc https://github.com/motioneye-project/motioneye/pull/3332 https://github.com/motioneye-project/motioneye/releases/tag/0.44.0 https://github.com/motioneye-project/motioneye/security/advisories/GHSA-r3cw-c95m-wfh9

Frequently Asked Questions

What is CVE-2026-46488? +

motionEye (mEye) is an online interface for a piece of software called "motion," which is a video surveillance program with motion detection. Prior to 0.44.0, motionEye accepts the client-controlled meye_username and meye_password_hash cookies as authentication material without server-side session validation. An unauthenticated attacker who knows a target username and corresponding hash can set the cookies manually or cause them to be loaded by submitting blank credentials through the switch-user authentication flow, after which the server authenticates the attacker as that user. The administrator username and password-hash value are stored in /etc/motioneye/motion.conf, which is globally readable by default, allowing a local shell user to obtain reusable administrator credential material. Successful impersonation can enable account lockout, password changes and persistence, data enumeration, data destruction, and data exfiltration. This issue is fixed in version 0.44.0.

How do I check if I'm vulnerable to CVE-2026-46488? +

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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