UnratedFix available
Fix CVE(s): CVE-2025-49630
Type: advisorySources: OSV
* SECURITY UPDATE: DoS in mod_proxy_http2 via missing Host header with ProxyPreserveHost - debian/patches/CVE-2025-49630.patch: in open_stream() in modules/http2/h2_proxy_session.c, when preserve_host is on and the client request has no Host header, fall back to r->server->server_hostname and add it to the request headers so a NULL authority no longer trips an assertion in the h2 proxy path. Backported from httpd commit 88304321841a2fe8bd5eacc70e69418b0b545ca5 (SVN r1927044, 2.4.x branch), plus adapted regression test from SVN r1934478 (test/modules/http2/test_600_h2proxy.py). - CVE-2025-49630
- Products
- apache2, apache2-bin, apache2-data, apache2-dev, apache2-doc, apache2-ssl-dev, apache2-suexec-custom, apache2-suexec-pristine, apache2-utils, libapache2-mod-md, libapache2-mod-proxy-uwsgi
- Affected versions
- Not specified
- Fixed versions
- 2.4.41-4ubuntu3.23+tuxcare.els14
- CVEs
- CVE-2025-49630
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:50 UTC · Revision 1
Source evidence
* SECURITY UPDATE: DoS in mod_proxy_http2 via missing Host header with ProxyPreserveHost - debian/patches/CVE-2025-49630.patch: in open_stream() in modules/http2/h2_proxy_session.c, when preserve_host is on and the client request has no Host header, fall back to r->server->server_hostname and add it to the request headers so a NULL authority no longer trips an assertion in the h2 proxy path. Backported from httpd commit 88304321841a2fe8bd5eacc70e69418b0b545ca5 (SVN r1927044, 2.4.x branch), plus adapted regression test from SVN r1934478 (test/modules/http2/test_600_h2proxy.py). - CVE-2025-49630
osv:CLSA-2026-1787222082
apache2
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-bin
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-data
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-dev
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-doc
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-ssl-dev
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-suexec-custom
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-suexec-pristine
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
apache2-utils
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
libapache2-mod-md
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
libapache2-mod-proxy-uwsgi
Fixed versions: 2.4.41-4ubuntu3.23+tuxcare.els14
Complete source record
{
"id": "4067738bdc4cca94ebb5265750f46d27458a974a8cb79973799238923c671ee1",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787222082",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2025-49630",
"summary": "* SECURITY UPDATE: DoS in mod_proxy_http2 via missing Host header with ProxyPreserveHost - debian/patches/CVE-2025-49630.patch: in open_stream() in modules/http2/h2_proxy_session.c, when preserve_host is on and the client request has no Host header, fall back to r->server->server_hostname and add it to the request headers so a NULL authority no longer trips an assertion in the h2 proxy path. Backported from httpd commit 88304321841a2fe8bd5eacc70e69418b0b545ca5 (SVN r1927044, 2.4.x branch), plus adapted regression test from SVN r1934478 (test/modules/http2/test_600_h2proxy.py). - CVE-2025-49630",
"evidence": "osv:CLSA-2026-1787222082",
"products": [
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{
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{
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"name": {
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"affected_versions": []
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{
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{
"name": {
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},
{
"name": {
"value": "libapache2-mod-md",
"evidence": "/affected/9/package/name"
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"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.41-4ubuntu3.23+tuxcare.els14",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libapache2-mod-proxy-uwsgi",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.4.41-4ubuntu3.23+tuxcare.els14",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
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],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787222082",
"aliases": [
"CLSA-2026-1787222082"
],
"affected": [
{
"ranges": [
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],
"package": {
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"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
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},
{
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"package": {
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"purl": "pkg:deb/tuxcare/apache2-bin?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
},
{
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{
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}
]
}
],
"package": {
"name": "apache2-data",
"purl": "pkg:deb/tuxcare/apache2-data?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
},
{
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],
"package": {
"name": "apache2-dev",
"purl": "pkg:deb/tuxcare/apache2-dev?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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}
},
{
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{
"fixed": "2.4.41-4ubuntu3.23+tuxcare.els14"
}
]
}
],
"package": {
"name": "apache2-doc",
"purl": "pkg:deb/tuxcare/apache2-doc?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
},
{
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],
"package": {
"name": "apache2-ssl-dev",
"purl": "pkg:deb/tuxcare/apache2-ssl-dev?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
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}
},
{
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],
"package": {
"name": "apache2-suexec-custom",
"purl": "pkg:deb/tuxcare/apache2-suexec-custom?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
},
{
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],
"package": {
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"purl": "pkg:deb/tuxcare/apache2-suexec-pristine?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
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{
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{
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],
"package": {
"name": "libapache2-mod-md",
"purl": "pkg:deb/tuxcare/libapache2-mod-md?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
},
{
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],
"package": {
"name": "libapache2-mod-proxy-uwsgi",
"purl": "pkg:deb/tuxcare/libapache2-mod-proxy-uwsgi?distro=ubuntu-20.04",
"ecosystem": "TuxCare:Ubuntu:20.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1787222082.json"
}
}
],
"modified": "2026-10-26T09:31:15.737598822Z",
"provider": "osv",
"upstream": [
"CVE-2025-49630"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1787222082.html",
"https://nvd.nist.gov/vuln/detail/CVE-2025-49630"
]
},
"related_cves": [
{
"value": "CVE-2025-49630",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 447538,
"published_at": "2026-08-20T10:34:51+00:00"
}