HTTP Server

Description

The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows.

Product name

http_server

CVE-2025-53020 (GCVE-0-2025-53020)

Vulnerability from – Published: 2025-07-10 16:59 – Updated: 2025-11-04 21:11
VLAI?
Title
Apache HTTP Server: HTTP/2 DoS by Memory Increase
Summary
Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63. Users are recommended to upgrade to version 2.4.64, which fixes the issue.
Severity ?
No CVSS data available.
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.17 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
Gal Bar Nahum
Show details on NVD website

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CVE-2025-49812 (GCVE-0-2025-49812)

Vulnerability from – Published: 2025-07-10 16:58 – Updated: 2025-11-04 21:11
VLAI?
Title
Apache HTTP Server: mod_ssl TLS upgrade attack
Summary
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.
Severity ?
No CVSS data available.
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 0 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
Robert Merget (Technology Innovation Institute) Nurullah Erinola (Ruhr University Bochum) Marcel Maehren (Ruhr University Bochum) Lukas Knittel (Ruhr University Bochum) Sven Hebrok (Paderborn University) Marcus Brinkmann (Ruhr University Bochum) Juraj Somorovsky (Paderborn University) Jörg Schwenk (Ruhr University Bochum)
Show details on NVD website

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CVE-2025-49630 (GCVE-0-2025-49630)

Vulnerability from – Published: 2025-07-10 16:57 – Updated: 2025-11-04 21:11
VLAI?
Title
Apache HTTP Server: mod_proxy_http2 denial of service
Summary
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".
Severity ?
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.26 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
Anthony CORSIEZ
Show details on NVD website

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CVE-2025-23048 (GCVE-0-2025-23048)

Vulnerability from – Published: 2025-07-10 16:56 – Updated: 2025-11-04 21:09
VLAI?
Title
Apache HTTP Server: mod_ssl access control bypass with session resumption
Summary
In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption. Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host.
Severity ?
No CVSS data available.
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.35 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky at Paderborn University
Show details on NVD website

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CVE-2024-47252 (GCVE-0-2024-47252)

Vulnerability from – Published: 2025-07-10 16:55 – Updated: 2025-11-04 21:08
VLAI?
Title
Apache HTTP Server: mod_ssl error log variable escaping
Summary
Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations. In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files.
Severity ?
No CVSS data available.
CWE
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
John Runyon
Show details on NVD website

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CVE-2024-43394 (GCVE-0-2024-43394)

Vulnerability from – Published: 2025-07-10 16:56 – Updated: 2025-11-04 21:08
VLAI?
Title
Apache HTTP Server: SSRF on Windows due to UNC paths
Summary
Server-Side Request Forgery (SSRF) in Apache HTTP Server on Windows allows to potentially leak NTLM hashes to a malicious server via  mod_rewrite or apache expressions that pass unvalidated request input. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.63. Note:  The Apache HTTP Server Project will be setting a higher bar for accepting vulnerability reports regarding SSRF via UNC paths. The server offers limited protection against administrators directing the server to open UNC paths. Windows servers should limit the hosts they will connect over via SMB based on the nature of NTLM authentication.
Severity ?
No CVSS data available.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.0 , ≤ 2.4.63 (semver)
Create a notification for this product.
Credits
Kainan Zhang (@4xpl0r3r) from Fortinet
Show details on NVD website

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CVE-2024-43204 (GCVE-0-2024-43204)

Vulnerability from – Published: 2025-07-10 16:54 – Updated: 2025-11-04 21:08
VLAI?
Title
Apache HTTP Server: SSRF with mod_headers setting Content-Type header
Summary
SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker.  Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request. Users are recommended to upgrade to version 2.4.64 which fixes this issue.
Severity ?
No CVSS data available.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.0 , ≤ 2.4.63 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2024-42516 (GCVE-0-2024-42516)

Vulnerability from – Published: 2025-07-10 16:53 – Updated: 2025-11-04 21:08
VLAI?
Title
Apache HTTP Server: HTTP response splitting
Summary
HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response. This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue. Users are recommended to upgrade to version 2.4.64, which fixes this issue.
Severity ?
No CVSS data available.
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.0 , ≤ 2.4.63 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2023-38709 (GCVE-0-2023-38709)

Vulnerability from – Published: 2024-04-04 19:19 – Updated: 2025-11-04 21:08
VLAI?
Title
Apache HTTP Server: HTTP response splitting
Summary
Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses. This issue affects Apache HTTP Server: through 2.4.58.
Severity ?
No CVSS data available.
CWE
  • HTTP response splitting
Assigner
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 0 , ≤ 2.4.58 (semver)
Create a notification for this product.
Credits
Orange Tsai (@orange_8361) from DEVCORE
Show details on NVD website

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CVE-2017-9798 (GCVE-0-2017-9798)

Vulnerability from – Published: 2017-09-18 15:00 – Updated: 2025-11-04 16:09
VLAI?
Summary
Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.
Severity ?
No CVSS data available.
CWE
  • use-after-free
Assigner
References
https://access.redhat.com/errata/RHSA-2017:3113 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/100872 vdb-entryx_refsource_BID
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:2882 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:2972 vendor-advisoryx_refsource_REDHAT
https://blog.fuzzing-project.org/uploads/apache-2… x_refsource_MISC
https://support.apple.com/HT208331 x_refsource_CONFIRM
http://www.securitytracker.com/id/1039387 vdb-entryx_refsource_SECTRACK
https://support.hpe.com/hpsc/doc/public/display?d… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3475 vendor-advisoryx_refsource_REDHAT
https://github.com/hannob/optionsbleed x_refsource_MISC
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https://access.redhat.com/errata/RHSA-2017:3018 vendor-advisoryx_refsource_REDHAT
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http://www.debian.org/security/2017/dsa-3980 vendor-advisoryx_refsource_DEBIAN
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https://www.exploit-db.com/exploits/42745/ exploitx_refsource_EXPLOIT-DB
https://security.gentoo.org/glsa/201710-32 vendor-advisoryx_refsource_GENTOO
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
https://lists.apache.org/thread.html/56c2e7cc9deb… mailing-listx_refsource_MLIST
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https://github.com/apache/httpd/commit/4cc2782389… x_refsource_MISC
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https://lists.apache.org/thread.html/r9ea3538f229… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rc998b18880d… mailing-listx_refsource_MLIST
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Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27
Create a notification for this product.
Show details on NVD website

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        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apache HTTP Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27"
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      "datePublic": "2017-09-18T00:00:00.000Z",
      "descriptions": [
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          "value": "Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user\u0027s .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c."
        }
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        {
          "descriptions": [
            {
              "description": "use-after-free",
              "lang": "en",
              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2021-06-06T10:11:48.000Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2017-9798",
    "datePublished": "2017-09-18T15:00:00.000Z",
    "dateReserved": "2017-06-21T00:00:00.000Z",
    "dateUpdated": "2025-11-04T16:09:11.219Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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