PT-2026-31711 · Apache+2 · Apache Tomcat+2

Bartlomiej Dmitruk · CVE-2026-34483 · Published 2026-04-02 · Updated 2026-07-09

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions Apache Tomcat versions 11.0.0-M1 through 11.0.20, 10.1.0-M1 through 10.1.53, and 9.0.40 through 9.0.116

Description A flaw exists within the JsonAccessLogValve component of Apache Tomcat related to improper encoding or escaping of output.

Recommendations Upgrade to version 11.0.21 Upgrade to version 10.1.54 Upgrade to version 9.0.117

Exploit

Fix

DoS

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-116

Related Identifiers

BDU:2026-07145

BIT-TOMCAT-2026-34483

CLEANSTART-2026-IS05941

CVE-2026-34483

GHSA-RV64-5GF8-9QQ8

MGASA-2026-0095

OESA-2026-1970

OPENSUSE-SU-2026:10547-1

OPENSUSE-SU-2026:10548-1

OPENSUSE-SU-2026:10549-1

OPENSUSE-SU-2026:20595-1

OPENSUSE-SU-2026:20611-1

OPENSUSE-SU-2026:20612-1

RHSA-2026:20405

SUSE-SU-2026:1558-1

SUSE-SU-2026:1572-1

SUSE-SU-2026:1603-1

SUSE-SU-2026:1604-1

SUSE-SU-2026:21366-1

SUSE-SU-2026:21378-1

SUSE-SU-2026:21379-1

Affected Products

Apache Tomcat

Confluence

Red Os

References · 128

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34483.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-34500 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:1603-1 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-tomcat-2026-34483 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33871 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-34483 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10548-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-41254 · Security Note
• https://osv.dev/vulnerability/CVE-2026-34483 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1558-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20611-1 · Vendor Advisory
• https://osv.dev/vulnerability/CLEANSTART-2026-IS05941 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1970 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10547-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1225 · Security Note