CVE-2026-34059 Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data()
An attacker can trigger a heap over-read in mod_proxy_ajp to disclose sensitive memory contents from the Apache HTTP Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-34059?
CVE-2026-34059 is a high-severity vulnerability in Apache Http Server, published on 4 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Buffer Over-read vulnerability in Apache HTTP Server.
This issue affects Apache HTTP Server: through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Weakness: CWE-126
Which versions are affected by CVE-2026-34059?
1 open source package ship an affected version, including apache. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | All versions | 2.4.67 |
Products include Apache Http Server.
How do I fix CVE-2026-34059?
Upgrade apache to 2.4.67 or later.
Is CVE-2026-34059 being exploited?
There is no known exploitation of CVE-2026-34059 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as ALPINE-CVE-2026-34059, AZL-86001, BELL-CVE-2026-34059, BIT-apache-2026-34059, DEBIAN-CVE-2026-34059, GHSA-m35f-pf48-r38q and 3 more.