[UPDATE] [medium] Apache Tomcat and Tomcat Native: Multiple vulnerabilities

CSIRTS triage

What

An attacker can exploit multiple vulnerabilities in Apache Tomcat to bypass security measures, manipulate data, disclose confidential information, conduct open redirect attacks, and carry out other unspecified attacks.

Who is affected

Deployments of Apache Tomcat.

Urgency

Remediation is medium 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

medium

Published

2026-07-10

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-2026-1038

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.

• Elevated exploitation riskCVE-2026-3448621.7% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 97% of all scored CVEs.
• Low exploitation riskCVE-2026-248800.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.
• Low exploitation riskCVE-2026-258540.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
• Low exploitation riskCVE-2026-291290.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all scored CVEs.
• Low exploitation riskCVE-2026-291450.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 49% of all scored CVEs.
• Moderate exploitation riskCVE-2026-291465.0% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 91% of all scored CVEs.
• Low exploitation riskCVE-2026-329900.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all scored CVEs.
• Low exploitation riskCVE-2026-344830.46% 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-2026-344870.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.
• Low exploitation riskCVE-2026-345000.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% 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
• high[UPDATE] [high] Atlassian products (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, and Jira): Multiple vuln…cert-bund

Recent advisories for Apache Tomcat and

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: Multiple vulnerabilitiescert-bund · 2026-07-09
• high[UPDATE] [high] Apache Tomcat: Multiple vulnerabilitiescert-bund · 2026-07-02
• 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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