UnratedFix available
osbuild-composer: Fix of CVE-2026-27136
Type: advisorySources: OSV
- CVE-2026-27136: ignore duplicate attributes during tokenization in the vendored golang.org/x/net/html, so that the parsed attribute list matches what Render emits, preventing an HTML sanitizer bypass
- Products
- osbuild-composer, osbuild-composer-core, osbuild-composer-tests, osbuild-composer-worker
- Affected versions
- Not specified
- Fixed versions
- 132.2-3.el9_6.alma.1.tuxcare.els7
- CVEs
- CVE-2026-27136
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:54 UTC · Revision 1
Source evidence
- CVE-2026-27136: ignore duplicate attributes during tokenization in the vendored golang.org/x/net/html, so that the parsed attribute list matches what Render emits, preventing an HTML sanitizer bypass
osv:CLSA-2026-1789483713
osbuild-composer
Fixed versions: 132.2-3.el9_6.alma.1.tuxcare.els7
osbuild-composer-core
Fixed versions: 132.2-3.el9_6.alma.1.tuxcare.els7
osbuild-composer-tests
Fixed versions: 132.2-3.el9_6.alma.1.tuxcare.els7
osbuild-composer-worker
Fixed versions: 132.2-3.el9_6.alma.1.tuxcare.els7
Complete source record
{
"id": "0d5add036528e322f5cb16ba1f4a7f4f87f980c2b59d561dfb9010117438f3bc",
"url": "https://osv.dev/vulnerability/CLSA-2026-1789483713",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "osbuild-composer: Fix of CVE-2026-27136",
"summary": "- CVE-2026-27136: ignore duplicate attributes during tokenization in the vendored golang.org/x/net/html, so that the parsed attribute list matches what Render emits, preventing an HTML sanitizer bypass",
"evidence": "osv:CLSA-2026-1789483713",
"products": [
{
"name": {
"value": "osbuild-composer",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "132.2-3.el9_6.alma.1.tuxcare.els7",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "osbuild-composer-core",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "132.2-3.el9_6.alma.1.tuxcare.els7",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "osbuild-composer-tests",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "132.2-3.el9_6.alma.1.tuxcare.els7",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "osbuild-composer-worker",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "132.2-3.el9_6.alma.1.tuxcare.els7",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1789483713",
"aliases": [
"CLSA-2026-1789483713"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "132.2-3.el9_6.alma.1.tuxcare.els7"
}
]
}
],
"package": {
"name": "osbuild-composer",
"purl": "pkg:rpm/tuxcare/osbuild-composer?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789483713.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "132.2-3.el9_6.alma.1.tuxcare.els7"
}
]
}
],
"package": {
"name": "osbuild-composer-core",
"purl": "pkg:rpm/tuxcare/osbuild-composer-core?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789483713.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "132.2-3.el9_6.alma.1.tuxcare.els7"
}
]
}
],
"package": {
"name": "osbuild-composer-tests",
"purl": "pkg:rpm/tuxcare/osbuild-composer-tests?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789483713.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "132.2-3.el9_6.alma.1.tuxcare.els7"
}
]
}
],
"package": {
"name": "osbuild-composer-worker",
"purl": "pkg:rpm/tuxcare/osbuild-composer-worker?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789483713.json"
}
}
],
"modified": "2026-10-26T09:31:34.846530037Z",
"provider": "osv",
"upstream": [
"CVE-2026-27136"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789483713.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27136"
]
},
"related_cves": [
{
"value": "CVE-2026-27136",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 447758,
"published_at": "2026-09-15T14:48:43+00:00"
}