Upstream information
Description
Kyverno before 1.19.2 contains an authentication bypass in matchCertificateData that skips verifyImages subject and subjectRegExp checks when the signing certificate has no Subject Alternative Name. Attackers holding a leaf certificate from a configured private trust root can omit the SAN, set the expected Fulcio issuer OID, and sign malicious images that are admitted despite signer pinning.SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having important severity.
| CVSS detail | CNA (VulnCheck) |
|---|---|
| Base Score | 7.7 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:L |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Changed |
| Confidentiality Impact | Low |
| Integrity Impact | High |
| Availability Impact | Low |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (VulnCheck) |
|---|---|
| Base Score | 7.2 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| Attack Vector | Network |
| Attack Complexity | High |
| Attack Requirements | Present |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | High |
| Vulnerable System Availability Impact | Low |
| Subsequent System Confidentiality Impact | Low |
| Subsequent System Integrity Impact | High |
| Subsequent System Availability Impact | Low |
| CVSSv4 Version | 4.0 |
SUSE Timeline for this CVE
CVE page created: Thu Nov 5 15:56:43 2026CVE page last modified: Fri Nov 6 17:58:15 2026