Heap-based Buffer Overflow Affecting apache/httpd package, versions [2.4.0,2.4.68)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published15 Jun 2026
- disclosed8 Jun 2026
- creditArkadi Vainbrand
Introduced: 8 Jun 2026
CVE-2026-34356 (opens in a new tab)How to fix?
Upgrade apache/httpd to version 2.4.68 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the ap_proxy_cookie_reverse_map() function when interacting with malicious backend servers. An attacker can execute arbitrary code or cause a denial of service by sending specially crafted responses from a backend server.