CVE-2026-34483
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.70-2 |
| sid | Fixed | 10.1.54-1 |
| forky | Fixed | 10.1.54-1 |
| bullseye | Fixed | 9.0.70-2 |
| bookworm | Fixed | 9.0.70-2 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-catalina | >=9.0.40,<9.0.116 | 9.0.116 |
| Maven | org.apache.tomcat:tomcat-catalina | >=10.1.0-M1,<10.1.54 | 10.1.54 |
| Maven | org.apache.tomcat:tomcat-catalina | >=11.0.0-M1,<11.0.21 | 11.0.21 |
| Maven | org.apache.tomcat:tomcat | >=9.0.40,<9.0.116 | 9.0.116 |
| Maven | org.apache.tomcat:tomcat | >=10.1.0-M1,<10.1.54 | 10.1.54 |
| Maven | org.apache.tomcat:tomcat | >=11.0.0-M1,<11.0.21 | 11.0.21 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >=9.0.40,<9.0.116 | 9.0.116 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >=10.1.0-M1,<10.1.54 | 10.1.54 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >=11.0.0-M1,<11.0.21 | 11.0.21 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-34483
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b
- http://www.openwall.com/lists/oss-security/2026/04/09/26
- https://www.suse.com/security/cve/CVE-2026-34483.html
- https://security-tracker.debian.org/tracker/CVE-2026-34483
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.