[NEW] [high] Apache Tomcat: Multiple Vulnerabilities

highCVE-2026-65182 CVE-2026-65183 CVE-2026-65637 CVE-2026-65905 CVE-2026-65927 CVE-2026-66422

An attacker can exploit multiple vulnerabilities in Apache Tomcat to bypass security measures, escalate privileges, manipulate or disclose data, or cause Denial-of-Service conditions.

CSIRTS triage

vendor: Apache product: Tomcat Authentication bypass Privilege escalation Information disclosure Denial of service

What: Multiple vulnerabilities in Apache Tomcat allow privilege escalation, security bypass, data manipulation or disclosure, and denial-of-service.
Who is affected: All deployments of Apache Tomcat running vulnerable versions.
Urgency: High priority; multiple attack vectors including remote exploitation and privilege escalation pose significant risk.
Action: Update Apache Tomcat to a patched version addressing CVE-2026-65182, CVE-2026-65183, CVE-2026-65637, CVE-2026-65905, CVE-2026-65927, CVE-2026-66422, CVE-2026-68525, and CVE-2026-68569.

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

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-08-26
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-2026-3007

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-2026-651820.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-651830.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-656370.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-659050.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-659270.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-664220.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-685250.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-685690.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-687630.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-731800.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-65182	coverage & exploitation status	NVD · CVE.org
CVE-2026-65183	coverage & exploitation status	NVD · CVE.org
CVE-2026-65637	coverage & exploitation status	NVD · CVE.org
CVE-2026-65905	coverage & exploitation status	NVD · CVE.org
CVE-2026-65927	coverage & exploitation status	NVD · CVE.org
CVE-2026-66422	coverage & exploitation status	NVD · CVE.org
CVE-2026-68525	coverage & exploitation status	NVD · CVE.org
CVE-2026-68569	coverage & exploitation status	NVD · CVE.org
CVE-2026-68763	coverage & exploitation status	NVD · CVE.org
CVE-2026-73180	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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.

unknownMultiple vulnerabilities in Apache Tomcat (August 26, 2026)cert-fr-avis · 2026-08-26
mediumCVE-2026-73180: Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID fo…nvd · 2026-08-25
highCVE-2026-68763: Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the…nvd · 2026-08-25
highCVE-2026-68569: Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. …nvd · 2026-08-25
criticalCVE-2026-68525: Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows th…nvd · 2026-08-25
highCVE-2026-66422: Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions b…nvd · 2026-08-25