UnratedFix available
httpd: Fix of CVE-2026-43951
Type: advisorySources: OSV
- CVE-2026-43951: fix Content-Language array iteration in merge_response_headers (modules/http/http_filters.c) and create_response (modules/http2/h2_c2_filter.c); the http2 hunk is inert in this --disable-http2 build and is kept for upstream fidelity
- Products
- httpd, httpd-core, httpd-devel, httpd-filesystem, httpd-manual, httpd-tools, mod_ldap, mod_lua, mod_proxy_html, mod_session, mod_ssl
- Affected versions
- Not specified
- Fixed versions
- 1:2.4.62-4.el9_6.4.tuxcare.els11, 2.4.62-4.el9_6.4.tuxcare.els11
- CVEs
- CVE-2026-43951
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:49 UTC · Revision 1
Source evidence
- CVE-2026-43951: fix Content-Language array iteration in merge_response_headers (modules/http/http_filters.c) and create_response (modules/http2/h2_c2_filter.c); the http2 hunk is inert in this --disable-http2 build and is kept for upstream fidelity
osv:CLSA-2026-1782209860
httpd
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
httpd-core
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
httpd-devel
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
httpd-filesystem
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
httpd-manual
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
httpd-tools
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
mod_ldap
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
mod_lua
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
mod_proxy_html
Fixed versions: 1:2.4.62-4.el9_6.4.tuxcare.els11
mod_session
Fixed versions: 2.4.62-4.el9_6.4.tuxcare.els11
mod_ssl
Fixed versions: 1:2.4.62-4.el9_6.4.tuxcare.els11
Complete source record
{
"id": "ad2fbdd1f71d60f207bb1d0cc20e715007470ce12fc53fd1bf20209c649b21a0",
"url": "https://osv.dev/vulnerability/CLSA-2026-1782209860",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "httpd: Fix of CVE-2026-43951",
"summary": "- CVE-2026-43951: fix Content-Language array iteration in merge_response_headers (modules/http/http_filters.c) and create_response (modules/http2/h2_c2_filter.c); the http2 hunk is inert in this --disable-http2 build and is kept for upstream fidelity",
"evidence": "osv:CLSA-2026-1782209860",
"products": [
{
"name": {
"value": "httpd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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{
"value": "2.4.62-4.el9_6.4.tuxcare.els11",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"evidence": "/affected/1/ranges"
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"affected_versions": []
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{
"name": {
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"evidence": "/affected/2/ranges"
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{
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"evidence": "/affected/3/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/4/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/5/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.62-4.el9_6.4.tuxcare.els11",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "mod_lua",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.62-4.el9_6.4.tuxcare.els11",
"evidence": "/affected/7/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/8/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/9/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "mod_ssl",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.4.62-4.el9_6.4.tuxcare.els11",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1782209860",
"aliases": [
"CLSA-2026-1782209860"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "httpd",
"purl": "pkg:rpm/tuxcare/httpd?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-2026-1782209860.json"
}
},
{
"ranges": [
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{
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}
]
}
],
"package": {
"name": "httpd-core",
"purl": "pkg:rpm/tuxcare/httpd-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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "2.4.62-4.el9_6.4.tuxcare.els11"
}
]
}
],
"package": {
"name": "httpd-devel",
"purl": "pkg:rpm/tuxcare/httpd-devel?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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.62-4.el9_6.4.tuxcare.els11"
}
]
}
],
"package": {
"name": "httpd-filesystem",
"purl": "pkg:rpm/tuxcare/httpd-filesystem?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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.62-4.el9_6.4.tuxcare.els11"
}
]
}
],
"package": {
"name": "httpd-manual",
"purl": "pkg:rpm/tuxcare/httpd-manual?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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "2.4.62-4.el9_6.4.tuxcare.els11"
}
]
}
],
"package": {
"name": "httpd-tools",
"purl": "pkg:rpm/tuxcare/httpd-tools?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-2026-1782209860.json"
}
},
{
"ranges": [
{
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{
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},
{
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}
]
}
],
"package": {
"name": "mod_ldap",
"purl": "pkg:rpm/tuxcare/mod_ldap?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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.62-4.el9_6.4.tuxcare.els11"
}
]
}
],
"package": {
"name": "mod_lua",
"purl": "pkg:rpm/tuxcare/mod_lua?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-2026-1782209860.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "1:2.4.62-4.el9_6.4.tuxcare.els11"
}
]
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],
"package": {
"name": "mod_proxy_html",
"purl": "pkg:rpm/tuxcare/mod_proxy_html?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-2026-1782209860.json"
}
},
{
"ranges": [
{
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},
{
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}
]
}
],
"package": {
"name": "mod_session",
"purl": "pkg:rpm/tuxcare/mod_session?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-2026-1782209860.json"
}
},
{
"ranges": [
{
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{
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}
]
}
],
"package": {
"name": "mod_ssl",
"purl": "pkg:rpm/tuxcare/mod_ssl?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-2026-1782209860.json"
}
}
],
"modified": "2026-10-26T09:31:08.093829261Z",
"provider": "osv",
"upstream": [
"CVE-2026-43951"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1782209860.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43951"
]
},
"related_cves": [
{
"value": "CVE-2026-43951",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 447458,
"published_at": "2026-06-23T10:17:57+00:00"
}