CVE-2026-78594— Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service
Quick assessment
Affected
Elastic Apm Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
以下是对该漏洞描述的专业翻译： APM 服务器中针对高度压缩数据的不当处理（CWE-409）可能导致通过“过度内存分配”（CAPEC-130）引发持续性拒绝服务（DoS）。拥有源码映射（source map）内容写入权限的认证用户，可以存储特制的、高度压缩的内容；当 APM 服务器后续处理该内容时，会耗尽可用内存，从而导致进程终止。由于该存储内容未被移除，此条件将在每次重启时重现，形成持续性故障。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-78594
Vulnerability Information
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Vulnerability Title
Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Elastic | Apm Server | 8.0.0 ~ 8.19.19 | - |
|
II. Public POCs for CVE-2026-78594
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-78594 (1)
Same Patch Batch · Elastic · 2026-09-02 · 15 CVEs total
| CVE-2026-78604 | 7.8 HIGH | Incorrect Permission Assignment for Critical Resource in Elastic Agent Leading to Local Pr |
| CVE-2026-78590 | 7.3 HIGH | Improper Limitation of a Pathname to a Restricted Directory in Kibana Leading to Unauthori |
| CVE-2026-78588 | 6.5 MEDIUM | Allocation of Resources Without Limits or Throttling in Filebeat Leading to Denial of Serv |
| CVE-2026-78586 | 6.5 MEDIUM | Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic |
| CVE-2026-78599 | 6.5 MEDIUM | Stored Path Traversal in Kibana Leading to Unauthorized Deletion of Internal Resources |
| CVE-2026-78591 | 6.3 MEDIUM | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana L |
| CVE-2026-78601 | 5.5 MEDIUM | Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure |
| CVE-2026-78598 | 5.4 MEDIUM | Incorrect Authorization in Kibana Leading to Unauthorized Cross-Space Exposure of Machine |
| CVE-2026-78609 | 5.4 MEDIUM | Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modificatio |
| CVE-2026-78602 | 5.3 MEDIUM | Improper Limitation of a Pathname to a Restricted Directory in Elastic Maps Server Leading |
| CVE-2026-82293 | 4.3 MEDIUM | Incorrect Authorization in Kibana Leading to Unauthorized Resource Consumption |
| CVE-2026-78584 | 4.3 MEDIUM | Observable Response Discrepancy in Kibana Leading to Cross-Space Information Disclosure |
| CVE-2026-78600 | 3.5 LOW | Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace |
| CVE-2026-78587 | 3.1 LOW | Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Opera |
IV. Related Vulnerabilities
Same product: Apm Server
Same vendor: Elastic
-
CVE-2026-82293
Incorrect Authorization in Kibana Leading to Unauthorized Re -
CVE-2026-78588
Allocation of Resources Without Limits or Throttling in File -
CVE-2026-78587
Incorrect Authorization in Fleet Server Leading to Denial of -
CVE-2026-78586
Allocation of Resources Without Limits or Throttling in Kiba -
CVE-2026-78584
Observable Response Discrepancy in Kibana Leading to Cross-S
Same weakness: CWE-409
-
CVE-2026-72628
Improper Handling of Highly Compressed Data in Kibana Leadin -
CVE-2026-82864
pdfme pdf-lib before 5.5.10 Denial of Service via Decompress -
CVE-2026-58107
Authenticated Remote Denial of Service via Unbounded zlib De -
CVE-2026-54556
Http4s: HTTP/2 Denial of Service with Ember Backend -
CVE-2026-80189
LeafWiki 0.10.0 through 0.12.0 Uncontrolled Resource Consump
V. Comments for CVE-2026-78594
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