# CVE-2026-34483: Apache Tomcat: Incomplete escaping of JSON access logs

> CVE-2026-34483: Apache Tomcat: Incomplete escaping of JSON access logs. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-34483
Last updated: 2026-06-17T10:39:07Z

- Published: 2026-04-09 19:30 UTC · Updated: 2026-06-17 10:39 UTC · Assigner: apache
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS: 0.46%, 40th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-116

## 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.

## Affected vendors and products

- Apache Software Foundation: Apache Tomcat

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-34483)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-34483)
- [https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b](https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-34483 · Markdown: https://rewindex.com/cve/CVE-2026-34483.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-34483 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:40.038Z