Information disclosure via partial OCSP request writes
Published Jun 8, 2026 · Updated Jun 8, 2026
Buffer over-read in mod_ssl in Apache HTTP Server 2.4.0 through 2.4.67 allows remote attackers to receive data beyond an OCSP request buffer. The send_request loop advances its stack-buffer pointer by the requested byte count rather than the smaller count actually written after a partial socket send. Exploitation requires an outbound OCSP request to an attacker-controlled responder and a partial write; the responder receives adjacent process-memory bytes.
Summary
What happened
Buffer over-read in mod_ssl in Apache HTTP Server 2.4.0 through 2.4.67 allows remote attackers to receive data beyond an OCSP request buffer. The send_request loop advances its stack-buffer pointer by the requested byte count rather than the smaller count actually written after a partial socket send. Exploitation requires an outbound OCSP request to an attacker-controlled responder and a partial write; the responder receives adjacent process-memory bytes.
The record
- CVE
- CVE-2026-44185
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache HTTP Server
- Classifications
- CWE-126
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.4.0 <=2.4.67
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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