Important: osbuild-composer security update
A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for local usage, it can also upload images directly to cloud. It is compatible with composer-cli and cockpit-composer clients. Security Fix(es): * golang.org/x/net/idna: golang: net/[http:](http:) golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821) * 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) * github.com/labstack/echo: Echo: Unauthorized Information Disclosure via URL Path Decoding Discrepancy (CVE-2026-55677) 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.
ALSA-2026:66432
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:ALSA-2026:66432
osbuild-composer
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 165.1-5.el10_2.alma.1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
osbuild-composer-core
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 165.1-5.el10_2.alma.1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
osbuild-composer-worker
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 165.1-5.el10_2.alma.1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "165.1-5.el10_2.alma.1"
}
]
}
],
"package": {
"name": "osbuild-composer",
"purl": "pkg:rpm/almalinux/osbuild-composer",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:66432.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "165.1-5.el10_2.alma.1"
}
]
}
],
"package": {
"name": "osbuild-composer-core",
"purl": "pkg:rpm/almalinux/osbuild-composer-core",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:66432.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "165.1-5.el10_2.alma.1"
}
]
}
],
"package": {
"name": "osbuild-composer-worker",
"purl": "pkg:rpm/almalinux/osbuild-composer-worker",
"ecosystem": "AlmaLinux:10"
},
"database_specific": {
"source": "https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:66432.json"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #83962 · Revision 1
- Added to Heist Feed
- Publisher date