RHSA-2026:66327: osbuild-composer Red Hat

CVSS: 8.8v3.1HighPublished

Published 10-09-2026Last modified 20-10-2026

Open JSON

Vulnerability summary

RHSA-2026:66327 is a high (CVSS 8.8) vulnerability in osbuild-composer Red Hat.

Overall risk

35/100

0100

Medium · default modelHow is this calculated?

CVSS score

8.8/10

010

High · v3.1 (OSV · Red hat), selected by version preference

EPSS score

Not scored

0%100%

No EPSS score yet

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits0No public exploits recorded

Advisory lineage

Upstream 11 · Downstream 0 · Related 10

CVE-2026-33810 CVE-2026-33818 CVE-2026-39820 CVE-2026-41178 CVE-2026-42499 CVE-2026-42504+5 more

Timeline

10-09-2026
PublishedVulnerability first disclosed.
20-10-2026
Last modifiedVulnerability information updated.

Description

Red Hat Security Advisory: osbuild-composer security, bug fix, and enhancement update

CVSS metrics

1 score · 1 source · 1 version

v3.18.8

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Redhat7 products

osbuild-composer< 0:134.1-12.el10_0
osbuild-composer-core< 0:134.1-12.el10_0
osbuild-composer-core-debuginfo< 0:134.1-12.el10_0
osbuild-composer-debugsource< 0:134.1-12.el10_0
osbuild-composer-tests-debuginfo< 0:134.1-12.el10_0

Show all 7

1 vendor · 7 products

References

84 links

Show all 84 references

bugzilla.redhat.com/show_bug.cgi?id=2515838REPORT
bugzilla.redhat.com/show_bug.cgi?id=2515839REPORT
bugzilla.redhat.com/show_bug.cgi?id=2515840REPORT
issues.redhat.com/browse/RHEL-127068ARTICLE
security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_66327.jsonAdvisory
access.redhat.com/security/cve/CVE-2026-33810REPORT
www.cve.org/CVERecord?id=CVE-2026-33810Advisory
nvd.nist.gov/vuln/detail/CVE-2026-33810Advisory
go.dev/cl/763763ARTICLE
go.dev/issue/78332ARTICLE
groups.google.com/g/golang-announce/c/0uYbvbPZRWUARTICLE
pkg.go.dev/vuln/GO-2026-4866Advisory
access.redhat.com/security/cve/CVE-2026-33818REPORT
www.cve.org/CVERecord?id=CVE-2026-33818Advisory
nvd.nist.gov/vuln/detail/CVE-2026-33818Advisory
go.dev/cl/814980ARTICLE
go.dev/issue/80405ARTICLE
groups.google.com/g/golang-announce/c/94pEornpRlIARTICLE
pkg.go.dev/vuln/GO-2026-5972Advisory
access.redhat.com/security/cve/CVE-2026-39820REPORT
www.cve.org/CVERecord?id=CVE-2026-39820Advisory
nvd.nist.gov/vuln/detail/CVE-2026-39820Advisory
go.dev/cl/759940ARTICLE
go.dev/issue/78566ARTICLE
groups.google.com/g/golang-announce/c/qcCIEXso47MARTICLE
pkg.go.dev/vuln/GO-2026-4986Advisory
access.redhat.com/security/cve/CVE-2026-41178REPORT
www.cve.org/CVERecord?id=CVE-2026-41178Advisory
nvd.nist.gov/vuln/detail/CVE-2026-41178Advisory
github.com/open-telemetry/opentelemetry-go/pull/7880ARTICLE
github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835ARTICLE
access.redhat.com/security/cve/CVE-2026-42499REPORT
www.cve.org/CVERecord?id=CVE-2026-42499Advisory
nvd.nist.gov/vuln/detail/CVE-2026-42499Advisory
go.dev/cl/771520ARTICLE
go.dev/issue/78987ARTICLE
pkg.go.dev/vuln/GO-2026-4977Advisory
access.redhat.com/security/cve/CVE-2026-42504REPORT
www.cve.org/CVERecord?id=CVE-2026-42504Advisory
nvd.nist.gov/vuln/detail/CVE-2026-42504Advisory
go.dev/cl/774481ARTICLE
go.dev/issue/79217ARTICLE
groups.google.com/g/golang-announce/c/tKs3rmcBcKwARTICLE
pkg.go.dev/vuln/GO-2026-5038Advisory
access.redhat.com/security/cve/CVE-2026-56853REPORT
www.cve.org/CVERecord?id=CVE-2026-56853Advisory
nvd.nist.gov/vuln/detail/CVE-2026-56853Advisory
go.dev/cl/795540ARTICLE
go.dev/issue/80205ARTICLE
pkg.go.dev/vuln/GO-2026-6089Advisory
access.redhat.com/security/cve/CVE-2026-56858REPORT
www.cve.org/CVERecord?id=CVE-2026-56858Advisory
nvd.nist.gov/vuln/detail/CVE-2026-56858Advisory
go.dev/cl/807100ARTICLE
go.dev/issue/80435ARTICLE
pkg.go.dev/vuln/GO-2026-6091Advisory
access.redhat.com/security/cve/CVE-2026-56859REPORT
www.cve.org/CVERecord?id=CVE-2026-56859Advisory
nvd.nist.gov/vuln/detail/CVE-2026-56859Advisory
go.dev/cl/803320ARTICLE
go.dev/issue/80481ARTICLE
pkg.go.dev/vuln/GO-2026-6088Advisory
access.redhat.com/security/cve/CVE-2026-56860REPORT
www.cve.org/CVERecord?id=CVE-2026-56860Advisory
nvd.nist.gov/vuln/detail/CVE-2026-56860Advisory
go.dev/cl/803681ARTICLE
go.dev/issue/80494ARTICLE
pkg.go.dev/vuln/GO-2026-6218Advisory
access.redhat.com/security/cve/CVE-2026-56862REPORT
www.cve.org/CVERecord?id=CVE-2026-56862Advisory
nvd.nist.gov/vuln/detail/CVE-2026-56862Advisory
go.dev/cl/804261ARTICLE
go.dev/issue/80528ARTICLE
pkg.go.dev/vuln/GO-2026-6090Advisory