CVE-2026-34032: Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)

mediumCVSS 5.3CVE-2026-34032

CSIRTS triage

vendor: Apache product: Apache HTTP Server Memory corruption

What: mod_proxy_ajp performs a heap buffer over-read due to missing null-termination validation in ajp_msg_get_string().
Who is affected: Deployments using Apache HTTP Server with mod_proxy_ajp enabled.
Urgency: Medium priority; memory corruption can lead to information disclosure or crashes, not yet publicly exploited.
Action: Apply the available Apache HTTP Server security patch for CVE-2026-34032.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.3
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34032

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-340320.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-34032	coverage & exploitation status	NVD · CVE.org

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