UnratedFix available
nginx: Fix of CVE-2026-42533
Type: advisorySources: OSV
- CVE-2026-42533: fix heap buffer overflow in the map directive with regex matching (script engine buffer overrun protection)
- Products
- nginx, nginx-all-modules, nginx-filesystem, nginx-mod-http-geoip, nginx-mod-http-image-filter, nginx-mod-http-perl, nginx-mod-http-xslt-filter, nginx-mod-mail, nginx-mod-stream
- Affected versions
- Not specified
- Fixed versions
- 1.10.3-4.el6.tuxcare.els11
- CVEs
- CVE-2026-42533
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:07 UTC · Revision 1
Source evidence
- CVE-2026-42533: fix heap buffer overflow in the map directive with regex matching (script engine buffer overrun protection)
osv:CLSA-2026-1784803994
nginx
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-all-modules
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-filesystem
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-http-geoip
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-http-image-filter
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-http-perl
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-http-xslt-filter
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-mail
Fixed versions: 1.10.3-4.el6.tuxcare.els11
nginx-mod-stream
Fixed versions: 1.10.3-4.el6.tuxcare.els11
Complete source record
{
"id": "263f529d201c6ac1572170be2d17cce9b8e43e3c9b8b6b50c1403579bcc21b18",
"url": "https://osv.dev/vulnerability/CLSA-2026-1784803994",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "nginx: Fix of CVE-2026-42533",
"summary": "- CVE-2026-42533: fix heap buffer overflow in the map directive with regex matching (script engine buffer overrun protection)",
"evidence": "osv:CLSA-2026-1784803994",
"products": [
{
"name": {
"value": "nginx",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-all-modules",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-filesystem",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-http-geoip",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-http-image-filter",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-http-perl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-http-xslt-filter",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-mail",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "nginx-mod-stream",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.10.3-4.el6.tuxcare.els11",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1784803994",
"aliases": [
"CLSA-2026-1784803994"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx",
"purl": "pkg:rpm/tuxcare/nginx?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-all-modules",
"purl": "pkg:rpm/tuxcare/nginx-all-modules?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-filesystem",
"purl": "pkg:rpm/tuxcare/nginx-filesystem?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-http-geoip",
"purl": "pkg:rpm/tuxcare/nginx-mod-http-geoip?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-http-image-filter",
"purl": "pkg:rpm/tuxcare/nginx-mod-http-image-filter?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-http-perl",
"purl": "pkg:rpm/tuxcare/nginx-mod-http-perl?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-http-xslt-filter",
"purl": "pkg:rpm/tuxcare/nginx-mod-http-xslt-filter?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-mail",
"purl": "pkg:rpm/tuxcare/nginx-mod-mail?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.3-4.el6.tuxcare.els11"
}
]
}
],
"package": {
"name": "nginx-mod-stream",
"purl": "pkg:rpm/tuxcare/nginx-mod-stream?distro=oraclelinux-6",
"ecosystem": "TuxCare:OracleLinux:6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/oraclelinux6els/CLSA-2026-1784803994.json"
}
}
],
"modified": "2026-10-26T09:31:46.147281045Z",
"provider": "osv",
"upstream": [
"CVE-2026-42533"
],
"references": [
"https://errata.tuxcare.com/els_os/oraclelinux6els/CLSA-2026-1784803994.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42533"
]
},
"related_cves": [
{
"value": "CVE-2026-42533",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448396,
"published_at": "2026-07-23T10:53:37+00:00"
}