UnratedFix available
httpd: Fix of CVE-2026-63686
Type: advisorySources: OSV
- CVE-2026-63686: fix mod_xml2enc NULL pointer dereference in xml2enc_ffunc() on a failed or incomplete charset conversion
- Products
- httpd, httpd-devel, httpd-filesystem, httpd-manual, httpd-tools, mod_ldap, mod_proxy_html, mod_session, mod_ssl
- Affected versions
- Not specified
- Fixed versions
- 1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23, 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
- CVEs
- CVE-2026-63686
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:17 UTC · Revision 1
Source evidence
- CVE-2026-63686: fix mod_xml2enc NULL pointer dereference in xml2enc_ffunc() on a failed or incomplete charset conversion
osv:CLSA-2026-1791552137
httpd
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
httpd-devel
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
httpd-filesystem
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
httpd-manual
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
httpd-tools
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
mod_ldap
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
mod_proxy_html
Fixed versions: 1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
mod_session
Fixed versions: 2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
mod_ssl
Fixed versions: 1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23
Complete source record
{
"id": "42b41e84c6ced73f08dc14cb42999c175deabb94c7973b8390d4e0fb20df6d4f",
"url": "https://osv.dev/vulnerability/CLSA-2026-1791552137",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "httpd: Fix of CVE-2026-63686",
"summary": "- CVE-2026-63686: fix mod_xml2enc NULL pointer dereference in xml2enc_ffunc() on a failed or incomplete charset conversion",
"evidence": "osv:CLSA-2026-1791552137",
"products": [
{
"name": {
"value": "httpd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "httpd-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "httpd-filesystem",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "httpd-manual",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "httpd-tools",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "mod_ldap",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "mod_proxy_html",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "mod_session",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "mod_ssl",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1791552137",
"aliases": [
"CLSA-2026-1791552137"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "httpd",
"purl": "pkg:rpm/tuxcare/httpd?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "httpd-devel",
"purl": "pkg:rpm/tuxcare/httpd-devel?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "httpd-filesystem",
"purl": "pkg:rpm/tuxcare/httpd-filesystem?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "httpd-manual",
"purl": "pkg:rpm/tuxcare/httpd-manual?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "httpd-tools",
"purl": "pkg:rpm/tuxcare/httpd-tools?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "mod_ldap",
"purl": "pkg:rpm/tuxcare/mod_ldap?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "mod_proxy_html",
"purl": "pkg:rpm/tuxcare/mod_proxy_html?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "mod_session",
"purl": "pkg:rpm/tuxcare/mod_session?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.4.37-43.module_el8.5.0+2659+eb75e1b0.tuxcare.els23"
}
]
}
],
"package": {
"name": "mod_ssl",
"purl": "pkg:rpm/tuxcare/mod_ssl?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791552137.json"
}
}
],
"modified": "2026-10-26T09:31:51.776528101Z",
"provider": "osv",
"upstream": [
"CVE-2026-63686"
],
"references": [
"https://errata.tuxcare.com/els_os/centos8.5els/CLSA-2026-1791552137.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-63686"
]
},
"related_cves": [
{
"value": "CVE-2026-63686",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448734,
"published_at": "2026-10-09T13:22:27+00:00"
}