CVE-2026-34486（apache tomcat）の深刻度・悪用状況・対象バージョン
7.5 重要（CVSS 3.x） 悪用確認済み（CISA KEV） EPSS 取得中…
概要
Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
実際の攻撃で悪用されています。 CISA KEV への追加日: 2026-08-04。対象製品を使っている場合は最優先で対策してください。
CISA の要求対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA の要求対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
影響を受ける製品
| ベンダー | 製品 | 対象バージョン |
|---|---|---|
| apache | tomcat | 9.0.116 |
| apache | tomcat | 10.1.53 |
| apache | tomcat | 11.0.20 |
| redhat | jboss_web_server | 7.0.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
| redhat | enterprise_linux_els | 7.0 |
| redhat | enterprise_linux_eus | 10.0 |
| redhat | enterprise_linux_tus | 8.8 |
| redhat | enterprise_linux_update_services_for_sap_solutions | 8.8 |
| redhat | enterprise_linux_update_services_for_sap_solutions | 9.2 |
| redhat | enterprise_linux_update_services_for_sap_solutions | 9.4 |
| redhat | enterprise_linux_update_services_for_sap_solutions | 9.6 |
基本情報
- 公開日
- 2026-04-09
- 最終更新
- 2026-10-26
- NVD の状態
- Analyzed
- 弱点の種類
- CWE-311 CWE-807
対策の進め方
- 上の表で、使っている製品とバージョンが対象か確認します。
- ベンダーの公式アドバイザリ（下の参考情報の「Vendor Advisory」「Patch」）で修正版・回避策を確認します。
- 悪用が確認されているため、パッチ適用までの間もアクセス制限・侵害の痕跡確認を検討します。
- 日本語の情報は JVN iPedia で CVE-2026-34486 を検索 できます。
参考情報
- https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly Mailing ListVendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat Third Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat MitigationThird Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36787 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36788 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36789 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36790 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36876 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36877 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36878 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36879 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:37136 Third Party Advisory
- NVD: CVE-2026-34486
- CVE.org: CVE-2026-34486
データ出典: NIST NVD、CISA KEV、FIRST EPSS。翻訳は参考情報で、正確性は原文を優先してください。