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Red Hat · Security advisory · April 6, 2026
Red Hat · Security advisory · April 6, 2026RHSA-2026:27856: osbuild-composer security update
RHSA-2026:27856, released April 6, 2026, fixes 2 CVEs in osbuild-composer (version 134.1-9.el10_0). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
2
None rated Critical
Exploited
0
None reported
Highest CVSS
9.1
Base score, 0 to 10
Highest EPSS
0.0162
76th percentile
Priority of the 2 CVEs
Patch now 0
Urgent 0
High 2
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| osbuild-composer | RHEL 10 | 134.1-9.el10_0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-33186 | gRPC-Go has an authorization bypass via missing leading slash in :path | 9.1 | 0.0162 | None reported |
| High | CVE-2026-34986 | osbuild-composer: A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood | 9.1 | 0.0066 | None reported |
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