CVE-2026-66139 — MEDIUM (4.8)

Vulnerability Description

OpenStack Zaqar through 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.

CVSS Score

4.8

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-306

References

https://bugs.launchpad.net/ossa/+bug/2161254
https://www.openwall.com/lists/oss-security/2026/07/23/7
http://www.openwall.com/lists/oss-security/2026/07/24/27

FAQ

What is CVE-2026-66139?

CVE-2026-66139 is a vulnerability with a CVSS score of 4.8 (MEDIUM). OpenStack Zaqar through 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.

How severe is CVE-2026-66139?

CVE-2026-66139 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-66139?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.