Improper Certificate Validation Affecting osbuild-composer-core package, versions <0:165.1-2.el9_8.rocky.0.1


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.61% (45th percentile)

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  • Snyk IDSNYK-ROCKY9-OSBUILDCOMPOSERCORE-17314913
  • published12 Jun 2026
  • disclosed6 Mar 2026

Introduced: 6 Mar 2026

CVE-2026-27137  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 osbuild-composer-core to version 0:165.1-2.el9_8.rocky.0.1 or higher.
This issue was patched in RLSA-2026:22714.

NVD Description

Note: Versions mentioned in the description apply only to the upstream osbuild-composer-core package and not the osbuild-composer-core package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

References

CVSS Base Scores

version 3.1