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CVE-2026-29168— Apache HTTP Server: mod_md unrestricted OCSP response

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.30版本至2.4.66版本存在安全漏洞，该漏洞源于mod_md通过OCSP响应数据存在资源分配无限制或节流问题。

AI Predicted 7.5 Difficulty: Easy EPSS 1.07% · P64

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache HTTP Server 2.4.30≤ 2.4.66 affected
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I. Basic Information for CVE-2026-29168

Vulnerability Information
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Vulnerability Title
Apache HTTP Server: mod_md unrestricted OCSP response
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in Apache HTTP Server's  mod_md via OCSP response data. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Apache HTTP Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.30版本至2.4.66版本存在安全漏洞，该漏洞源于mod_md通过OCSP响应数据存在资源分配无限制或节流问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache HTTP Server 2.4.30 ~ 2.4.66 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-29168

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III. Intelligence Information for CVE-2026-29168

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Vendor Advisories for CVE-2026-29168 (1)

Same Patch Batch · Apache Software Foundation · 2026-05-05 · 5 CVEs total

CVE-2026-28780 Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()
CVE-2026-43868 Apache Thrift: Rust implementation vulnerable to CVE-2020-13949 pattern
CVE-2026-43870 Apache Thrift: Node.js web_server.js multi-vulnerability
CVE-2026-43869 Apache Thrift: TSSLTransportFactory.java hostname verification

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation
Same weakness: CWE-770

V. Comments for CVE-2026-29168

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