UnratedApache Software Foundation Updated

Advisory [CVE-2026-34355] Apache HTTP Server: mod_proxy_html buffer overflow

This security Apache Software Foundation advisory covers CVE-2026-34355 affecting Apache HTTP Server.

CVE-2026-34355 Published Jun 8, 2026Updated by vendor Aug 27, 2026

CVE-2026-34355

Affected products & platforms

Apache Software FoundationHTTP Server

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Summary

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.

Affected versions

Apache HTTP Server 2.4.0 through 2.4.67

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Fixed versions

2.4.68

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to version 2.4.68, which fixes this issue.

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed for the summary, affected/fixed versions and remediation guidance it provides.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-34355 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-34355NVD CVE.org MITRE

Official resources

Apache HTTP Server 2.4 vulnerabilities (official fixed-in table) (target: 2.4.68)
Official documentation
This advisory names 2.4.68 as the first fixed release — official upgrade documentation for Apache HTTP Server 2.4 vulnerabilities (official fixed-in table).
ASF Security — reporting & CVE process
Official documentation
The Apache Software Foundation's official security page: how ASF CVEs are published and where each project's advisories live.
Apache project downloads (fixed releases)
Official documentation
Official ASF download tree — fetch the fixed release named in this advisory from the project's directory.

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