9.8

CVE-2026-65637: apache software foundation apache tomcat Improper Input Validation

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-65637DEBIAN-CVE-2026-65637
Published 25-08-2026Last modified 26-08-2026
Open JSON

Vulnerability summary

CVE-2026-65637 is a critical (CVSS 9.8) Improper Input Validation vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.57%
0%100%
Low · -0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 20 · Related 16
MGASA-2026-0376OPENSUSE-SU-2026:11759-1OPENSUSE-SU-2026:11760-1OPENSUSE-SU-2026:11761-1OPENSUSE-SU-2026:21810-1OPENSUSE-SU-2026:21811-1

Timeline

  1. 25-08-2026
    PublishedVulnerability first disclosed.
  2. 26-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

46%

Versus all other CVEs

30-day change

-0.18 pp

From 0.75% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.57%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu6 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat6All versions (No fix recorded)
  • tomcat7All versions (No fix recorded)
  • tomcat8All versions (No fix recorded)
Debian3 products
  • tomcat10All versions (No fix recorded) | < 10.1.60-1
  • tomcat11All versions (No fix recorded)
  • tomcat9< 9.0.70-2
Apache1 product
  • tomcat≥ 9.0.115, < 9.0.121 | ≥ 10.1.53, < 10.1.58 | ≥ 11.0.20, < 11.0.25
Apache software foundation1 product
  • apache tomcat≥ 11.0.20, ≤ 11.0.24 | ≥ 10.1.53, ≤ 10.1.57 | ≥ 9.0.115, ≤ 9.0.120

4 vendors · 11 products

References

7 links