Vulnerability Details CVE-2025-49630
In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.
Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.1%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2025-49630
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cpe:2.3:a:apache:http_server:2.4.26
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cpe:2.3:a:apache:http_server:2.4.27
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cpe:2.3:a:apache:http_server:2.4.28
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cpe:2.3:a:apache:http_server:2.4.29
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cpe:2.3:a:apache:http_server:2.4.30
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cpe:2.3:a:apache:http_server:2.4.31
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cpe:2.3:a:apache:http_server:2.4.32
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cpe:2.3:a:apache:http_server:2.4.33
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cpe:2.3:a:apache:http_server:2.4.34
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cpe:2.3:a:apache:http_server:2.4.35
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cpe:2.3:a:apache:http_server:2.4.36
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cpe:2.3:a:apache:http_server:2.4.37
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cpe:2.3:a:apache:http_server:2.4.38
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cpe:2.3:a:apache:http_server:2.4.39
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cpe:2.3:a:apache:http_server:2.4.40
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cpe:2.3:a:apache:http_server:2.4.41
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cpe:2.3:a:apache:http_server:2.4.42
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cpe:2.3:a:apache:http_server:2.4.43
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cpe:2.3:a:apache:http_server:2.4.44
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cpe:2.3:a:apache:http_server:2.4.45
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cpe:2.3:a:apache:http_server:2.4.46
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cpe:2.3:a:apache:http_server:2.4.47
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cpe:2.3:a:apache:http_server:2.4.48
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cpe:2.3:a:apache:http_server:2.4.49
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cpe:2.3:a:apache:http_server:2.4.50
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cpe:2.3:a:apache:http_server:2.4.51
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cpe:2.3:a:apache:http_server:2.4.52
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cpe:2.3:a:apache:http_server:2.4.53
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cpe:2.3:a:apache:http_server:2.4.54
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cpe:2.3:a:apache:http_server:2.4.55
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cpe:2.3:a:apache:http_server:2.4.56
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cpe:2.3:a:apache:http_server:2.4.57
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cpe:2.3:a:apache:http_server:2.4.58
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cpe:2.3:a:apache:http_server:2.4.59
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cpe:2.3:a:apache:http_server:2.4.60
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cpe:2.3:a:apache:http_server:2.4.61
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cpe:2.3:a:apache:http_server:2.4.62