CVE-2026-34483

HIGH EPSS 36.6%
Published Apr 9, 20262mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 9, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
36.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-116

Affected Products 3

VendorProductVersionRange
apachetomcat*≥9.0.40  –  <9.0.117
apachetomcat*≥10.1.0  –  <10.1.54
apachetomcat*≥11.0.0  –  <11.0.21

References 2

  • openwall.com http://www.openwall.com/lists/oss-security/2026/04/09/26
    Mailing ListThird Party Advisory
  • lists.apache.org https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b
    Mailing ListVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.