CVE-2025-49812

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Source
https://cve.org/CVERecord?id=CVE-2025-49812
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-49812.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-49812
Aliases
Downstream
Related
Published
2025-07-10T16:58:23.943Z
Modified
2026-05-18T05:59:33.453706708Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Apache HTTP Server: mod_ssl TLS upgrade attack
Details

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.

Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.4.63"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49812.json",
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-287"
    ]
}
References

Affected packages

Git / github.com/apache/httpd

Affected ranges

Type
GIT
Repo
https://github.com/apache/httpd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7e926454793abd7d71b6afc8bd1ec1648752c6ad
Database specific 
{
    "cpe": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.4.64"
        }
    ]
}

Affected versions

2.*
2.4.64-rc2-candidate

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-49812.json"