Cyber Resilience

CVE-2026-34356

High

Published: 08 June 2026

Published
08 June 2026
Modified
09 June 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0073 49.5th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-34356 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Apache Http Server. Its CVSS base score is 7.5 (High).

Operationally, ranked at the 49.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-122

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

apache
http server
2.4.0 — 2.4.68

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References