VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 4 August 2026Ransomware use: unknown
Apache Tomcat

CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 4 Aug 2026, 117 days after the CVE record was published.

How likely is exploitation in the next 30 days?
98.5%

EPSS score, percentile 99.9 of all scored records

How severe?
7.5 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 7 Aug 2026. Apply mitigations in accordance with vendor instructions … Full text

Advisories and patches (1)

Which versions are affected?

Affected

  • 11.0.20
  • 10.1.53
  • 9.0.116

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

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 due date for this action: 7 August 2026.

Advisories and patches

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Apache Software Foundation Apache Tomcat
StatusVersions
Affected11.0.20
Affected10.1.53
Affected9.0.116

Versions not listed are: unaffected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Apache Tomcat contains a missing encryption of sensitive data vulnerability that allows the bypass of the EncryptInterceptor. This vulnerability can be chained with CVE‑2025‑24813.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2026-34486 to its Known Exploited Vulnerabilities (KEV) catalog on 4 Aug 2026.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 7 Aug 2026.
  • The CVE record was published on 9 Apr 2026, 117 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 7.5 (High), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 98.5% (percentile 99.9), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

  • CWE-311: Missing Encryption of Sensitive Data

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
9 Apr 2026CVE record published
4 Aug 2026Added to CISA KEV
7 Aug 2026CISA due date for the required action
21 Sep 2026CVE record last updated

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  • CVE-2016-3081: Apache Struts Command Injection Vulnerability (added 8 Oct 2026)
  • CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability (added 16 Apr 2026)
  • CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability (added 1 May 2025)
  • CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability (added 1 Apr 2025)
  • CVE-2024-45195: Apache OFBiz Forced Browsing Vulnerability (added 4 Feb 2025)
  • CVE-2024-27348: Apache HugeGraph-Server Improper Access Control Vulnerability (added 18 Sep 2024)