Issued at: 2026-09-15
Updated at: 2026-09-16
Advisory content derived from Red Hat RHSA-2026:67139, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: image-builder security update
Description
A local binary for building customized OS artifacts such as VM images and OSTree commits. Uses osbuild under the hood.
Security Fix(es):
* golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via HTML parsing bypass (CVE-2026-27136)
* golang.org/x/net/html: golang.org/x/net/html: Arbitrary code execution via Cross-Site Scripting (CVE-2026-25681)
* golang.org/x/net/html: golang: golang.org/x/net/html: Cross-Site Scripting via unexpected HTML tree rendering (CVE-2026-42502)
* github.com/open-telemetry/opentelemetry-go: go.opentelemetry.io/otel/baggage: go.opentelemetry.io/otel/propagation: OpenTelemetry-Go: Denial of Service via oversized baggage headers (CVE-2026-41178)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.