Secuno
ENNL
Book demo

CVE-2026-65637

Apache Tomcat vulnerability

9.8 CRITICALEPSS 0.57%
  1. Published25 Aug 2026

Description

Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Apache Tomcat≥ 10.1.53 < 10.1.58 · ≥ 11.0.20 < 11.0.25 · ≥ 9.0.115 < 9.0.121

Remediation

Fixed in
Apache Tomcat≥ 10.1.58

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-843178.8
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1,…
CVE-2026-843168.8
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1,…
CVE-2026-571438.8
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.62,…
CVE-2026-1034138.8
Improper input validation vulnerability in Apache Camel Karavan. When a deployment…
CVE-2026-764688.2
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764568.6
As part of Cisco's ongoing commitment to proactive security and product quality, the…

Frequently asked

Is CVE-2026-65637 being actively exploited?

CVE-2026-65637 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.57%.

How severe is CVE-2026-65637?

CVE-2026-65637 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.57% probability of exploitation.

Which products are affected by CVE-2026-65637?

Affected products include Apache Tomcat.

How do I fix CVE-2026-65637?

Upgrade affected software to a fixed version, for example Apache Tomcat 10.1.58 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-65637 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.