7.5

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

CVSS: 7.5v3.1HighKEVAnalyzed
AliasesUBUNTU-CVE-2026-34486CGA-f993-jcr3-wjw5CGA-hjgc-vf5q-g8vv
Published 09-04-2026Last modified 21-09-2026
Open JSON

Vulnerability summary

CVE-2026-34486 is a high (CVSS 7.5) Missing Encryption of Sensitive Data vulnerability in Apache Tomcat. It is known to be exploited: CISA lists it, first on 04-08-2026. EPSS estimates a 6.56% chance of exploitation in the next 30 days, higher than 93.7% of scored vulnerabilities.

Overall risk
85/100
0100
Critical · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
6.56%
0%100%
Low · -92.05 pp in 30 days
KEVListedCISA
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 11
MGASA-2026-0095OPENSUSE-SU-2026:10547-1OPENSUSE-SU-2026:10548-1OPENSUSE-SU-2026:10549-1OPENSUSE-SU-2026:20595-1OPENSUSE-SU-2026:20611-1

Timeline

  1. 09-04-2026
    PublishedVulnerability first disclosed.
  2. 04-08-2026
    Added to CISA KEVApache Tomcat Missing Encryption of Sensitive Data Vulnerability
  3. 07-08-2026
    CISA remediation dueApply mitigations per vendor instructions.
  4. 21-09-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

6.56%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

-92.05 pp

From 98.62% on 18-09-2026

18-09-202618-10-2026
EPSS score
6.56%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
04-08-2026
Federal due date
07-08-2026

CISA 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. lists.apache.org/thread/9510k5p5zdvt9pkkgtyp85mvwxo2qrly nvd.nist.gov/vuln/detail/CVE-2026-34486

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat6 products
Chainguard3 products
  • nacos< 3.2.0-r6
  • ontop< 5.5.0-r8
  • ontop-fips< 5.5.0-r4
Org.apache.tomcat2 products
  • tomcat≥ 11.0.20, < 11.0.21 | ≥ 10.1.53, < 10.1.54 | ≥ 9.0.116, < 9.0.117
  • tomcat-tribes≥ 11.0.20, < 11.0.21 | ≥ 10.1.53, < 10.1.54 | ≥ 9.0.116, < 9.0.117
Apache1 product
  • tomcat9.0.116 | 10.1.53 | 11.0.20
Apache software foundation1 product
Ubuntu1 product
  • tomcat8All versions (No fix recorded)

6 vendors · 14 products

References

34 links
Show all 34 references