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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "D19AAC4D-6828-4CFA-9C92-6D1F89F7297E", "versionEndExcluding": "2.4.67", "versionStartIncluding": "2.4.30", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Allocation of Resources Without Limits or Throttling vulnerability in Apache HTTP Server's\u00a0 mod_md via OCSP response data.\n\nThis issue affects Apache HTTP Server: from 2.4.30 through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue."}], "id": "CVE-2026-29168", "lastModified": "2026-05-06T18:39:20.980", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-05-05T14:16:08.507", "references": [{"source": "security@apache.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/05/6"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security@apache.org", "type": "Secondary"}]}

{"bugzilla": {"description": "httpd: mod_md: unrestricted OCSP response leads to resource exhaustion", "id": "2466753", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466753"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in the mod_md module of httpd. When processing OCSP (Online Certificate Status Protocol) responses from a malicious or compromised OCSP responder, the module fails to enforce proper size limits on the incoming data. This issue leads to memory exhaustion and a denial of service."], "mitigation": {"lang": "en:us", "value": "Disabling mod_md and restarting httpd will mitigate this flaw."}, "name": "CVE-2026-29168", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "mod_md", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "httpd:2.4/mod_md", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "mod_md", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Affected", "package_name": "jbcs-httpd24-mod_md", "product_name": "Red Hat JBoss Core Services"}], "public_date": "2026-05-05T13:10:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-29168\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-29168\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "statement": "To exploit this flaw, the Apache HTTP Server must query an untrusted or compromised OCSP responder, limiting its exposure. Due to this reason, this vulnerability has been rated with a moderate severity.\nThis flaw only affects configurations with mod_md loaded and being used. This module can be disabled via the configuration file if its functionality is not being used.", "threat_severity": "Moderate"}

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