Improper Null Termination, Out-of-bounds 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.
CVE-2026-34032
MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence
Score 5.3 from GitHub Security Advisory published 2026-05-04. NVD baseline CVSS 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0
A fix is available — apply it.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EPSS
- 38.3%
- KEV
- Not listed
Published
May 4, 2026
Last Modified
May 4, 2026
Advisory Details (1)
Auto-updated May 4, 2026⚠️ Active exploitation confirmed. Patch available.
generic Patch Available🔴 Active Exploitation
Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project
https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisories for CVE-2026-34032(7)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:27200Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP4 security update
- RHSA-2026:27201Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP4 security update
- RHSA-2026:22140Red Hat Product SecurityHigh
Red Hat Security Advisory: httpd:2.4 security update
- RHSA-2026:21433Red Hat Product SecurityHigh
Red Hat Security Advisory: httpd security update
- RHSA-2026:21391Red Hat Product SecurityHigh
Red Hat Security Advisory: httpd security update
- CVE-2026-34032Microsoft Security Response Center (MSRC)Medium
Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)
- RHSA-2026:13938Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Patch Availability(5)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | apache2-utils (2.4.66-2ubuntu2.1) @ resolute | 2026-06-14 | ubuntu |
| redhat | httpd:2.4-8100020260519200905.489197e6 | 2026-06-01 | redhat |
| redhat | httpd-0:2.4.63-13.el10_2.1 | 2026-05-27 | redhat |
| redhat | httpd-0:2.4.62-13.el9_8.1 | 2026-05-27 | redhat |
| redhat | httpd-main-2.4.67-0.1.hum1 | 2026-05-06 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2026-34032?
CVE-2026-34032 is a medium vulnerability published on May 4, 2026. Improper Null Termination, Out-of-bounds 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.
When was CVE-2026-34032 disclosed?
CVE-2026-34032 was first published in the National Vulnerability Database on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34032 actively exploited?
CVE-2026-34032 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34032?
CVE-2026-34032 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-34032?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34032, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-34032
Is Your Infrastructure Affected by CVE-2026-34032?
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