OCSP Resource Exhaustion in Apache HTTP Server mod_md
CVE-2026-29168 is an Allocation of Resources Without Limits or Throttling flaw in Apache HTTP Server's mod_md component, specifically in handling OCSP response data. The issue affects Apache HTTP Server versions 2.4.30 through 2.4.66. Available reporting indicates that oversized OCSP response packets/data can cause mod_md to allocate or consume resources without adequate bounds, leading to excessive resource consumption during OCSP response processing.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A resource exhaustion vulnerability in Apache HTTP Server mod_md where oversized OCSP response packets can consume resources and cause slowdown or crash.
A low-severity resource exhaustion vulnerability in Apache HTTP Server mod_md's OCSP response handler caused by uncapped resource allocation.
Apache HTTP Server mod_md vulnerability related to processing OCSP responses.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.