High severity7.5NVD Advisory· Published Jun 8, 2026· Updated Jun 9, 2026
CVE-2026-34356
CVE-2026-34356
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
14cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*range: >=2.4.0,<2.4.68
- (no CPE)range: 2.4.0 - 2.4.67
- osv-coords12 versionspkg:bitnami/apachepkg:rpm/almalinux/httpdpkg:rpm/almalinux/httpd-corepkg:rpm/almalinux/httpd-develpkg:rpm/almalinux/httpd-filesystempkg:rpm/almalinux/httpd-manualpkg:rpm/almalinux/httpd-toolspkg:rpm/almalinux/mod_ldappkg:rpm/almalinux/mod_luapkg:rpm/almalinux/mod_proxy_htmlpkg:rpm/almalinux/mod_sessionpkg:rpm/almalinux/mod_ssl
>= 2.4.0, < 2.4.68+ 11 more
- (no CPE)range: >= 2.4.0, < 2.4.68
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 1:2.4.63-13.el10_2.4
- (no CPE)range: < 2.4.63-13.el10_2.4
- (no CPE)range: < 1:2.4.63-13.el10_2.4
Patches
Vulnerability mechanics
References
2- httpd.apache.org/security/vulnerabilities_24.htmlnvdVendor Advisory
- www.openwall.com/lists/oss-security/2026/06/08/7nvdMailing List
News mentions
3- Apache HTTP Server and Answer: 22 Vulnerabilities Disclosed, Including Critical FlawsVypr Intelligence · Jun 10, 2026
- Apache HTTP Server 2.4.68 Released With Fix For Use-After-Free, DoS, XSS, and Buffer Overflow FlawsCyber Security News · Jun 9, 2026
- Apache HTTP Server: 11 Vulnerabilities Disclosed, Including DoS and Memory Corruption FlawsVypr Intelligence · Jun 8, 2026