CVE-2026-78594Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-409
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- elastic
- NVD analysis
- Analyzed
- Record last updated
- Sep 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Elastic Apm Server elastic:apm_server (from the name) | from 8.0.0 through 8.19.19; from 9.0.0 through 9.4.4; 9.5.0 | CNA record |
elastic apm_server elastic:apm_server | from 8.0.0 before 8.19.20; from 9.0.0 before 9.4.5; 9.5.0 | NVD |
References
- https://discuss.elastic.co/t/apm-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-152/390110vendor-advisory, mitigation
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.