What is CVE-2026-34486?
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.
Timeline
- 2026-04-09Published to the U.S. National Vulnerability Database (NVD)
- 2026-08-04Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-08-06First covered in a defend.network daily briefing
- 2026-08-07CISA federal remediation deadline (BOD 22-01)
- 2026-10-26NVD record last updated
CISA Known Exploited Vulnerability
Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
Affected product
Apache Tomcat
NVD also lists CPE entries for: Apache Tomcat, Redhat Jboss Web Server, Redhat Enterprise Linux, Redhat Enterprise Linux Els, Redhat Enterprise Linux Eus
Remediation Steps
- Apply the vendor security update for Apache Tomcat as a priority.
- Restrict network exposure of the affected service to trusted sources until patched.
- Review logs and detections for indicators of exploitation.
- Confirm fixed versions against the official vendor advisory before deploying.
References
- https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-detection-script-rce-on-apache-tomcat
- https://www.vicarius.io/vsociety/posts/cve-2026-34486-mitigation-script-rce-on-apache-tomcat
- https://nvd.nist.gov/vuln/detail/CVE-2026-34486
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 5 of August 2026 (August 31 – September 6)
- Vulnerability Priority Report – Week 4 of August 2026 (August 24 – 30)
- Vulnerability Priority Report – Week 3 of August 2026 (August 17 – 23)
- Vulnerability Priority Report – Week 2 of August 2026 (August 10 – 16)
- Vulnerability Priority Report – Week 1 of August 2026 (August 3 – 9)
- Linux KVM escape, Cisco SD-WAN patches, Spectre v2 defenses bypassed (2026-08-07)
- IBM Langflow, Apache Tomcat, N-able RCE and auth bypass actively exploited (2026-08-06)
Related vulnerabilities
- CVE-2026-46300 – Linux Kernel (same product)
- CVE-2022-0492 – Linux Kernel (same product)
- CVE-2015-5287 – Red Hat Automatic Bug Reporting Tool (same product)
- CVE-2015-3246 – Red Hat Libuser (same product)
- CVE-2026-48710 – Kludex Starlette (same vendor)
- CVE-2026-42271 – BerriAI LiteLLM (same vendor)
Browse all tracked CVEs in the defend.network CVE database →
🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.