anonhaven

CVE-2026-66139

MEDIUM CVSS 3.1: 4.8 EPSS 0.29%
Updated Jul 25, 2026
OpenStack
Parameter Value
CVSS 4.8 (MEDIUM)
Type CWE-306 (Missing Authentication for Critical Function)
Vendor OpenStack
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
Low
Partial disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-306 Missing Authentication for Critical Function

References 3

https://bugs.launchpad.net/ossa/+bug/2161254
cve@mitre.org
https://www.openwall.com/lists/oss-security/2026/07/23/7
cve@mitre.org
http://www.openwall.com/lists/oss-security/2026/07/24/27
af854a3a-2127-422b-91ae-364da2661108
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