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CVE-2026-34355highCWE-120CWE-122

Apache HTTP Server: mod_proxy_html buffer overflow

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 2.7%
exploitation probability
2.7%top 15% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Apache Software Foundation · Apache HTTP Server
References
https://access.redhat.com/errata/RHSA-2026:25042https://access.redhat.com/errata/RHSA-2026:34109https://access.redhat.com/errata/RHSA-2026:41906https://access.redhat.com/errata/RHSA-2026:42828https://access.redhat.com/errata/RHSA-2026:47046https://access.redhat.com/errata/RHSA-2026:53371https://access.redhat.com/errata/RHSA-2026:56868https://access.redhat.com/errata/RHSA-2026:56869https://access.redhat.com/errata/RHSA-2026:62165https://access.redhat.com/errata/RHSA-2026:66323https://access.redhat.com/errata/RHSA-2026:67152https://access.redhat.com/security/cve/CVE-2026-34355