Apache HTTP Server Buffer Over-read in OCSP Requests

CVE-2026-44185 is a buffer over-read vulnerability affecting Apache HTTP Server versions 2.4.0 through 2.4.67 that occurs during outbound OCSP (Online Certificate Status Protocol) requests. When the server makes requests to an attacker-controlled OCSP responder, a malicious response can trigger a buffer over-read condition, potentially exposing sensitive memory contents or causing a denial of service. This vulnerability matters because OCSP is a standard mechanism for checking certificate revocation status, making it a trusted component in the certificate validation chain. Organizations running affected Apache versions in any configuration that performs OCSP validation are at risk, particularly those in security-conscious environments that actively validate certificate status for client or upstream connections.

While CVE-2026-44185 does not map to specific MITRE ATT&CK techniques, Casky's 754 security skills enable practitioners to detect the attack patterns underlying this vulnerability through Claude AI's extended reasoning capabilities. A practitioner using Casky would identify indicators such as: abnormal network traffic patterns to external OCSP responders, unexpected memory access violations in Apache processes, crash dumps showing buffer boundary violations during certificate validation operations, and timing anomalies in OCSP response handling. The platform's skill set would flag suspicious OCSP server responses with malformed or oversized payloads, correlate certificate validation failures with specific Apache versions, and detect exploitation attempts that probe the buffer boundaries during the certificate status checking workflow. By mapping these behavioral indicators to the underlying vulnerability mechanics, practitioners gain visibility into both successful exploitation and reconnaissance activities targeting this weakness.