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VULNERABILITIES

CVE-2026-78594 Details

Description

Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.9 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110 [email protected]Vendor AdvisoryMitigation

Weakness Enumeration

CWE-IDCWE NameSource
CWE-409Improper Handling of Highly Compressed Data (Data Amplification)[email protected]

Affected Products

ProductVersions
elastic apm server
>= 8.0.0, < 8.19.20
>= 9.0.0, < 9.4.5
9.5.0

CPE

  • cpe:2.3:a:elastic:apm_server:*:*:*:*:*:*:*:*
  • cpe:2.3:a:elastic:apm_server:9.5.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-78594
NVD Published Date:
Sep 2, 2026
NVD Last Modified:
Sep 3, 2026
Source:
[email protected]
CVE-2026-78594 Details - Not Deferred