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.
The record classifies CVE-2026-34486 under weakness classes CWE-311, CWE-807. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 184 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS (FIRST)
- 42.6% probability of exploitation in the next 30 days, higher than 98.5% of all scored CVEs
- CISA KEV
- Listed since 2026-08-04, federal remediation deadline 2026-08-07
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-04-09, last modified 2026-08-05
Is CVE-2026-34486 being exploited?
CISA added CVE-2026-34486 to the Known Exploited Vulnerabilities catalog on 2026-08-04, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-08-07 under BOD 22-01. Weaponised exploit code for CVE-2026-34486 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2026/CVE-2026-34486.yaml). It currently carries a trending score of 45 in the Threadlinqs vulnerability feed.
- anonmrc/CVE-2026-34486-e-Tomcat-Tribes (github)
- razureink/cve-2026-34486-tomcat_encrypt_bypass_reproduction (github)
- trickest/cve (trickest)
Affected products and versions
- Apache Software Foundation: Apache Tomcat
Affected software packages:
maven:org.apache.tomcat:tomcat— patched in 11.0.21maven:org.apache.tomcat:tomcat— patched in 10.1.54maven:org.apache.tomcat:tomcat— patched in 9.0.117maven:org.apache.tomcat:tomcat-tribes— patched in 11.0.21maven:org.apache.tomcat:tomcat-tribes— patched in 10.1.54maven:org.apache.tomcat:tomcat-tribes— patched in 9.0.117
How to fix CVE-2026-34486
Fixed versions are recorded for 6 packages: maven:org.apache.tomcat:tomcat 11.0.21, maven:org.apache.tomcat:tomcat 10.1.54, maven:org.apache.tomcat:tomcat 9.0.117, maven:org.apache.tomcat:tomcat-tribes 11.0.21, maven:org.apache.tomcat:tomcat-tribes 10.1.54, maven:org.apache.tomcat:tomcat-tribes 9.0.117. Vendor advisory: https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly. Because CVE-2026-34486 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-08-07. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-34486
1 tracked threat in the Threadlinqs corpus references CVE-2026-34486, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.