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Response snapshot Oct 27, 2026, 04:51 UTC

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VulnerabilityCVE-2026-34486Known exploitation

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability

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.

At a glance

Exploited
Yes: on CISA's Known Exploited list
Severity
7.5 High (CVSS 3.1)
Chance of exploitation
98.5% in the next 30 days
CISA federal deadline
Aug 7, 2026: passed
Sources
4 independent sources

What to do

Check the vendor advisory for affected versions and fixes.

CISA's required action: 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.

Read NVD CVE-2026-34486 (opens a new tab)

CISA federal deadline

Federal due date passed

Applies to covered US federal agencies; it is not your organization's deadline.

Added to the catalog Known ransomware use: Unknown
CISA catalog (opens a new tab)

Scores and how they were measured

CVSS base severity

7.5

Version 3.1As of

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

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

98.5%

Scored Percentile 99.9%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    NVD CVE-2026-34486 (opens a new tab)

    NVD record: description, CVSS, affected products, and a CISA SSVC assessment reporting active exploitation.

    Published Checked

  2. Primary source

    Vendor advisory (via NVD references) (opens a new tab)

    The vendor advisory referenced by the CVE record, for affected versions and fixes.

    Published Date not suppliedChecked

  3. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  5. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  6. Primary source

    CISA KEV entry CVE-2026-34486 (opens a new tab)

    The CVE-2026-34486 catalog entry establishes known exploitation, date added, required action, and the federal due date; not zero-day status.

    Published Checked

  7. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-34486, scored 2026-10-26. This is a model estimate, not proof of exposure.

    Published Checked

  8. Primary source

    CVE Program ADP assessment CISA-ADP (opens a new tab)

    The published CVE-2026-34486 document's ADP assessment supplies this CVSS 3.1 base score, vector, and authoritative source update date.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 26). Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (CVE-2026-34486). https://kevwire.com/record/CVE-2026-34486

MLA

"Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (CVE-2026-34486)." KEVWire, 26 Oct. 2026, kevwire.com/record/CVE-2026-34486.

Chicago

KEVWire. "Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (CVE-2026-34486)." Last modified October 26, 2026. https://kevwire.com/record/CVE-2026-34486.

Evidence summary (plain text)

Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (Apr 9, 2026).
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.
CVSS 7.5 (version 3.1; evidence as of Sep 21, 2026; https://cveawg.mitre.org/api/cve/CVE-2026-34486).
EPSS 98.5% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-34486&date=2026-10-26).
Sources:
NVD CVE-2026-34486: https://nvd.nist.gov/vuln/detail/CVE-2026-34486
Vendor advisory (via NVD references): https://lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-26T21:46:18.206Z&lastModEndDate=2026-10-26T23:15:56.398Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-26T21:12:32.956Z&lastModEndDate=2026-10-26T22:45:54.988Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-26T20:37:18.143Z&lastModEndDate=2026-10-26T22:10:56.995Z&resultsPerPage=500&startIndex=500
CISA KEV entry CVE-2026-34486: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-34486&date=2026-10-26
CVE Program ADP assessment CISA-ADP: https://cveawg.mitre.org/api/cve/CVE-2026-34486
Record ID: CVE-2026-34486.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Documented by a cited source.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
CISA federal due date: Aug 7, 2026. This is a deadline for covered US federal agencies, not the reader's SLA.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 01:40 UTC. Ingestion is not an independent editorial investigation.

NVD status: Analyzed. Publication in the NVD is not evidence of exploitation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail