What is CVE-2026-115289?

CVE-2026-115289 is a medium-severity vulnerability in Elastic Apm Server, classified under Use of Multiple Resources with Duplicate Identifier. CVSS score: 4.3/10. Published 2026-11-03.

How severe is CVE-2026-115289?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Elastic Apm Server

CVE-2026-115289

Use of Multiple Resources with Duplicate Identifier (CWE-694) in APM Server can lead to information disclosure via a specially crafted agent configuration request. An authenticated APM agent could receive the central agent configuration that belongs to a different service until the cached configuration expires. A service could also run with central configuration settings, such as sampling settings, that were meant for a different service.

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Elastic Apm Server

Weakness classification (CWE)

CWE-694 — Use of Multiple Resources with Duplicate Identifier

References

discuss.elastic.co/t/apm-server-8-19-24-9-4-9-9-5-6-security-update-esa-2026-20…

Frequently asked questions

What is CVE-2026-115289?: CVE-2026-115289 is a medium-severity vulnerability in Elastic Apm Server, classified under Use of Multiple Resources with Duplicate Identifier. CVSS score: 4.3/10. Published 2026-11-03.
How severe is CVE-2026-115289?: Medium severity. CVSS v3 base score is 4.3 out of 10.