Linux · Security advisory · September 15, 2026
RLSA-2026:67148: osbuild-composer security update
RLSA-2026:67148, released September 15, 2026, fixes 6 CVEs in osbuild-composer (version 0:101.5-3.el8_10.rocky.0.6). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
6
None rated Critical
Exploited
0
None reported
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0080
56th percentile
Priority of the 6 CVEs
Patch now 0
Urgent 0
High 6
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| osbuild-composer | rocky 8 | 0:101.5-3.el8_10.rocky.0.6 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| High | CVE-2026-42499 | Quadratic string concatenation in consumePhrase in net/mail | 8.8 | 0.0080 | None reported | |
| High | CVE-2026-42504 | Quadratic complexity in WordDecoder.DecodeHeader in mime | 8.8 | 0.0056 | None reported | |
| High | CVE-2026-55677 | osbuild-composer: A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood | 8.2 | 0.0052 | None reported | |
| High | CVE-2026-32281 | Inefficient policy validation in crypto/x509 | 9.1 | 0.0036 | None reported | |
| High | CVE-2026-41178 | opentelemetry-collector: OpenTelemetry-Go is the Go implementation of OpenTelemetry | 8.2 | 0.0034 | None reported | |
| High | CVE-2025-22866 | osbuild-composer: A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood | 7.5 | 0.0029 | None reported |
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