CVE-2026-78594 — Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service

CVE-2026-78594

Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Apm Server	affected 8.0.0 through 8.19.19; affected 9.0.0 through 9.4.4; affected 9.5.0

CWE

CWE-409

References

https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.