CVE-2026-34355
Apache HTTP Server: mod_proxy_html buffer overflow
7.5
HIGH
CVSS 3.1
Description
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.
How to fix CVE-2026-34355
To remediate CVE-2026-34355, upgrade the affected package to a fixed version below.
- Bitnami/apache—upgrade to 2.4.68 or later
- Debian/apache2—no fix listed
Is CVE-2026-34355 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-34355.
Affected packages (2)
- >= 2.4.0, < 2.4.68
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| nvd | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |