How severe is CVE-2026-34486?

CVE-2026-34486 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34486 being actively exploited?

Yes. CVE-2026-34486 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-04, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-34486?

CVE-2026-34486 primarily affects Apache Tomcat. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34486?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-34486 have an EU (EUVD) identifier?

Yes. CVE-2026-34486 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21056.

When was CVE-2026-34486 published?

CVE-2026-34486 was published on 2026-04-09 and last updated on 2026-08-10.

CVE-2026-34486

CVE-2026-34486 is a high-severity vulnerability in Apache Tomcat with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-08-04). The underlying weakness is classified as CWE-311.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 83% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-08-04)
EU (EUVD) id: EUVD-2026-21056
Weakness: CWE-311
Affected product: Apache Tomcat
Published: 2026-04-09
Last modified: 2026-08-10

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.

Frequently asked questions

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.
How severe is CVE-2026-34486?: CVE-2026-34486 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34486 being actively exploited?: Yes. CVE-2026-34486 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-04, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-34486?: CVE-2026-34486 primarily affects Apache Tomcat. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34486?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-34486 have an EU (EUVD) identifier?: Yes. CVE-2026-34486 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21056.
When was CVE-2026-34486 published?: CVE-2026-34486 was published on 2026-04-09 and last updated on 2026-08-10.

References

Affected products (14)

cpe:2.3:a:apache:tomcat:9.0.116:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:10.1.53:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:11.0.20:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_web_server:7.0.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_els:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_tus:8.8:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:8.8:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.2:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.6:*:*:*:*:*:*:*

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