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Tomcat CVE-2026-29146

| EUVDEUVD-2026-21012 HIGH
Error Message Information Leak (CWE-209)
2026-04-09 apache GHSA-h468-7pvh-8vr8
Apache Information Disclosure Oracle Tomcat Apache Tomcat
7.5
CVSS 3.1 · Vendor: apache
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Severity by source

Vendor (apache) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (apache).

CVSS VectorVendor: apache

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
Patch released
Apr 11, 2026 - 02:30 nvd
Patch available
EUVD ID Assigned
Apr 09, 2026 - 19:45 euvd
EUVD-2026-21012
Analysis Generated
Apr 09, 2026 - 19:45 vuln.today
CVE Published
Apr 09, 2026 - 19:21 nvd
HIGH 7.5

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 442 maven packages depend on org.apache.tomcat.embed:tomcat-embed-core (33 direct, 409 indirect)
  • 20 maven packages depend on org.apache.tomcat:tomcat-catalina (8 direct, 12 indirect)
  • 9 maven packages depend on org.apache.tomcat:tomcat-tribes (3 direct, 6 indirect)

Ecosystem-wide dependent count for version 9.0.13 and other introduced versions.

DescriptionCVE.org

Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.0.0-M1 through 10.1.52, from 9.0.13 through 9..115, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.

Users are recommended to upgrade to version 11.0.19, 10.1.53 and 9.0.116, which fixes the issue.

AnalysisAI

Padding oracle attack in Apache Tomcat EncryptInterceptor leaks encrypted session data confidentiality across versions 7.0.100-7.0.109, 8.5.38-8.5.100, 9.0.13-9.0.115, 10.0.0-M1-10.1.52, and 11.0.0-M1-11.0.18 when default configuration is deployed. Unauthenticated remote attackers exploit oracle responses to decrypt sensitive information without authentication (CVSS:3.1 AV:N/AC:L/PR:N). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Send encrypted HTTP requests to EncryptInterceptor
Delivery
Observe response timing differences
Exploit
Deduce padding bytes via oracle
Execution
Decrypt session data
Impact
Compromise confidentiality
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Vulnerability AssessmentAI

Exploitation Remote unauthenticated attacker against Apache Tomcat 7.0.100–7.0.109, 8.5.38–8.5.100, 9.0.13–9.0.115, 10.0.0-M1–10.1.52, or 11.0.0-M1–11.0.18 with EncryptInterceptor enabled in default configuration. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Unauthenticated padding oracle attack on Tomcat EncryptInterceptor enables confidentiality breach with high impact (CVSS 7.5). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Attacker sends crafted encrypted payloads to Tomcat EncryptInterceptor endpoint, observes timing/error responses to deduce padding validity, iteratively decrypts sensitive data (session tokens, credentials). No public exploit identified at time of analysis; unauthenticated network-level access required.
Remediation Vendor-released patch: upgrade to Apache Tomcat 11.0.19, 10.1.53, or 9.0.116 immediately. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all Tomcat deployments using versions 7.0.100-7.0.109, 8.5.38-8.5.100, 9.0.13-9.0.115, 10.0.0-M1-10.1.52, or 11.0.0-M1-11.0.18 and document active instances. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected

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CVE-2026-29146 vulnerability details – vuln.today
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