[UPDATE] [high] Apache Tomcat: Multiple vulnerabilities

CSIRTS triage

What

An attacker can exploit multiple vulnerabilities in Apache Tomcat to bypass security measures, disclose confidential information, manipulate data, trigger a Denial-of-Service condition, or conduct other unspecified attacks.

Who is affected

Deployments of Apache Tomcat.

Urgency

Remediation is high urgency due to the variety of potential attacks.

Action

Apply patches as they become available.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

high

Published

2026-07-02

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1514

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-412840.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.
• Moderate exploitation riskCVE-2026-412931.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 68% of all scored CVEs.
• Low exploitation riskCVE-2026-424980.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all scored CVEs.
• Moderate exploitation riskCVE-2026-435121.2% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 65% of all scored CVEs.
• Low exploitation riskCVE-2026-435130.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.
• Low exploitation riskCVE-2026-435140.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
• Moderate exploitation riskCVE-2026-435151.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 63% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[UPDATE] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: …cert-bund

Recent advisories for Apache Tomcat

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• medium[UPDATE] [medium] Apache Tomcat and Tomcat Native: Multiple vulnerabilitiescert-bund · 2026-07-10
• medium[UPDATE] [medium] Apache Tomcat: Multiple vulnerabilitiescert-bund · 2026-07-09
• unknownApache Tomcat Multiple Vulnerabilitieshkcert · 2026-07-02
• unknownMultiple vulnerabilities in Apache Tomcat (June 30, 2026)cert-fr-avis · 2026-06-30
• highCVE-2026-55957: Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was …nvd · 2026-06-29
• mediumCVE-2026-55956: Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified …nvd · 2026-06-29

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