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Description

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

PUBLISHED Reserved 2026-03-27 | Published 2026-06-08 | Updated 2026-06-08 | Assigner apache

Problem types

CWE-122 Heap-based Buffer Overflow

Product status

Default status
unaffected

2.4.0 (semver)
affected

Timeline

2026-02-23:reported
2026-06-05:fixed in 2.4.x by r1935008
2026-06-08:2.4.68 released

Credits

Arkadi Vainbrand finder

depthfirst (depthfirst.com) finder

References

www.openwall.com/lists/oss-security/2026/06/08/7

httpd.apache.org/security/vulnerabilities_24.html vendor-advisory

cve.org (CVE-2026-34356)

nvd.nist.gov (CVE-2026-34356)

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