Cyber Resilience

CVE-2026-34355

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 0.0059 43.4th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-34355 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 43.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this 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