Vulnerability in elk (CVE-2026-49095)
Summary
Vulnerability in elk (CVE-2026-49095). Confidential information can be exposed externally. Mitigation: upgrade to 8.19.16, 9.3.5, 9.4.2 or later.
Original description
The description as published by the source.
Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead to privilege escalation. An authenticated user with Fleet management privileges can manipulate agent policy configuration by injecting values into a configuration override mechanism that is not adequately validated. An attacker can cause Elastic Agents to be issued API keys with elevated Elasticsearch privileges, potentially granting unauthorized read and write access to sensitive Elasticsearch security indices beyond what is intended for the Fleet management role.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-49095 has been found in elk.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: upgrade elk to 8.19.16, 9.3.5, 9.4.2 or later.
If unsure, ask your IT team or search "elk CVE-2026-49095" on the vendor's site.
CVE-2026-49095 (elk) — CWE-20 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Patched: 8.19.16, 9.3.5, 9.4.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-20) exists in elk.
Check the vendor advisory for the affected versions of elk.
Severity: Medium (CVSS 6.5/10). Confidential information can be exposed externally.
Update to 8.19.16, 9.3.5, 9.4.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'elk' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'elk' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
elkを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade elk to 8.19.16, 9.3.5, 9.4.2ステージング環境で 8.19.16, 9.3.5, 9.4.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- advisory github.com
- web discuss.elastic.co
- web github.com