Vulnerability in elk (CVE-2026-33463)
Summary
Vulnerability in elk (CVE-2026-33463). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 8.19.16, 9.3.5 or later.
Original description
The description as published by the source.
Operation on a Resource after Expiration or Termination (CWE-672) in Kibana can lead to unauthorized information disclosure. A logic error in how expiration timestamps were validated allowed a time-bounded access token to remain usable beyond its intended validity window, enabling an unauthenticated actor in possession of the token to retrieve the associated content after expiration.
Source: NIST National Vulnerability Database 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-2026-33463 has been found in elk.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: upgrade elk to 8.19.16, 9.3.5 or later.
If unsure, ask your IT team or search "elk CVE-2026-33463" on the vendor's site.
CVE-2026-33463 (elk) — CWE-672 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 8.19.16, 9.3.5 — 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-672) exists in elk.
Check the vendor advisory for the affected versions of elk.
Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.
Update to 8.19.16, 9.3.5.
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ステージング環境で 8.19.16, 9.3.5 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
- patch security@elastic.co
- web nvd.nist.gov
- web github.com