ElasticCVE-2026-78594
Elastic Apm Server: denial of service
Medium4.9CVE-2026-78594 · Published Sep 2, 2026 · updated Sep 3, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Apm Server Product | >= 8.0.0, <= 8.19.19 | No fix yet |
| >= 9.0.0, <= 9.4.4 | No fix yet | |
| <= 9.5.0 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-409
More Elastic advisories
All Elastic| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 2 | Elastic Kibana: improper authorization | Medium4.3 | No fix yet |
| Sep 2 | Elastic Kibana: path traversal | Medium6.5 | No fix yet |
| Sep 2 | Elastic Eck Operator: incomplete cleanup | Low3.5 | No fix yet |
| Sep 2 | Elastic Kibana: missing authorization | Medium5.5 | No fix yet |
| Sep 2 | Elastic Maps Server: path traversal | Medium5.3 | No fix yet |
| Sep 2 | Elastic Agent: insecure permissions | High7.8 | No fix yet |