CVE-2026-50229: Org.apache.tomcat:tomcat: Apache Tomcat has a Cross-site Scripting vulnerability
Affects org.apache.tomcat:tomcatSource GCVE Database
Not known to be exploited · public detection template (Nuclei) · CVSS 6.1 Medium : upgrade to 11.0.23 when convenient.
Data as of 4 Nov 2026, 17:15 UTC
- Patch
- Available – fixed in 11.0.23, 10.1.56, 9.0.119
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Jun 2026
Detectable: evidence found.
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: evidence found.
3 exposed hosts found; no attack traffic recorded
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), OffSeq Mirage (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
Upgrade org.apache.tomcat:tomcat to 11.0.23; org.apache.tomcat:tomcat to 10.1.56; org.apache.tomcat:tomcat to 9.0.119.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mavenorg.apache.tomcat:tomcat | Affected
| Fixed in
|
| Mavenorg.apache.tomcat:tomcat | Affected
| Fixed in
|
| Mavenorg.apache.tomcat:tomcat | Affected
| Fixed in
|
| Mavenorg.apache.tomcat:tomcat | Affected
| Fixed in– |
| Mavenorg.apache.tomcat:tomcat | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users are advised to upgrade to Apache Tomcat versions 11.0.23, 10.1.56, or 9.0.119 or later, where this vulnerability has been fixed. Applying these official fixes will remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Description
Apache Tomcat contains a cross-site scripting (XSS) vulnerability in the number guess example that affects multiple versions across the 7.x, 8.5.x, 9.x, 10.1.x, and 11.x branches. This vulnerability allows improper neutralization of script-related HTML tags, potentially enabling script injection. Fixed versions are available in Apache Tomcat 11.0.23, 10.1.56, and 9.0.119.
References
- nvd.nist.gov/vuln/detail/CVE-2026-50229 (opens in a new tab)
- github.com/apache/tomcat/commit/0d5bdd5b0dd964e9f73e530b7d753462b9bfd1d0 (opens in a new tab)
- github.com/apache/tomcat/commit/1fe95d841e9d461a16069974142d12c3ef68819a (opens in a new tab)
- github.com/apache/tomcat/commit/de5a950415fc67713f17fab63d0c7809e0fca80b (opens in a new tab)
- github.com/apache/tomcat (opens in a new tab)
- lists.apache.org/thread/wlt2no8bw45zl1w8byop4zfqphldf5j0 (opens in a new tab)
- tomcat.apache.org/security-10.html (opens in a new tab)
- tomcat.apache.org/security-11.html (opens in a new tab)
- tomcat.apache.org/security-9.html (opens in a new tab)
- openwall.com/lists/oss-security/2026/06/29/20 (opens in a new tab)