CVE-2026-34486

Exploitation active confirmée

Ajoutée au catalogue CISA KEV le 04/08/2026, correctif exigé avant le 07/08/2026 pour les agences fédérales américaines.

Action requise : 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.

Description officielle (NVD)

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.

Preuves de concept publiques (5)

Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.

• striga-ai/CVE-2026-34486 · ★ 70 · 11/05/2026
  EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.
• AirSkye/CVE-2026-34486-poc · ★ 12 · 15/04/2026
  CVE-2026-34486 Apache Tomcat EncryptInterceptor 绕过漏洞复现（使用GLM5.1复现完成）
• 404-src/CVE-2026-34486 · ★ 10 · 15/04/2026
  Apache Tomcat EncryptInterceptor Bypass → Unauthenticated RCE (CVE-2026-34486)
• razureink/cve-2026-34486-tomcat_encrypt_bypass_reproduction · ★ 0 · 23/07/2026
  CVE Reproduction: cve-2026-34486-tomcat_encrypt_bypass_reproduction
• CypherHippie/CVE-2026-34486---unauthenticated-RCE-via-Java-deserialization · ★ 0 · 19/08/2026
  EncryptInterceptor fail-open bypass in Apache Tomcat Tribes clustering leading to unauthenticated RCE via Java deserialization.

Références

• https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly , Mailing List, Vendor 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 , Mitigation, Third 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
• https://access.redhat.com/errata/RHSA-2026:37137 , Third Party Advisory
• https://access.redhat.com/errata/RHSA-2026:38505 , Third Party Advisory
• https://access.redhat.com/errata/RHSA-2026:39188 , Third Party Advisory
• https://access.redhat.com/errata/RHSA-2026:39189 , Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2026-34486 , Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2457027 , Issue Tracking, Third Party Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34486.json , Third Party Advisory
• https://socradar.io/blog/snowlight-government-chinese-campaign/ , Third Party Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34486 , US Government Resource

En bref

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.

Produits concernés

Sources officielles

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