OpenStack Zaqar through 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.
Priority LOW 23CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
OpenStack Zaqar through 22.0.0 allows authentication bypass via an EXTRA-SPEC header when a UUID is known.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00476 41st percentileScored 2026-11-07
Fix Fixed Zaqar (OpenStack): 20.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Zaqar (OpenStack) Fixed in 20.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-66139
- 2026-10-03 Alias added: GHSA-gmmh-575h-g7v8
References
More OpenStack vulnerabilities
- TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
- TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
- TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
- TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
- TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
- TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8
Sources
- CVE-2026-66139 · CVE Program
- CVE-2026-66139 · NVD
- FIRST EPSS
- GHSA-gmmh-575h-g7v8 · GitHub Advisory Database · CC BY 4.0
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