CVE-2026-50229: Tomcat6 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability
Affects tomcat6Source GCVE Database
Exposed hosts seen by OffSeq Mirage · public detection template (Nuclei) · CVSS 6.1 Medium · fixed in 8.0.32-1ubuntu1.13+esm2 : update tomcat6 when convenient.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 4.0% chance of exploitation in 30 days – higher than 90% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 8.0.32-1ubuntu1.13+esm2, 8.5.39-1ubuntu1~18.04.3+esm6
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 29 Oct 2026.
What to do
Upgrade the Ubuntu tomcat8 to 8.0.32-1ubuntu1.13+esm2 (package) or 8.5.39-1ubuntu1~18.04.3+esm6 (package).
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10tomcat10pkg:deb/ubuntu/tomcat10?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10tomcat11pkg:deb/ubuntu/tomcat11?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10tomcat9pkg:deb/ubuntu/tomcat9?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTStomcat10pkg:deb/ubuntu/tomcat10?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTStomcat9pkg:deb/ubuntu/tomcat9?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTStomcat11pkg:deb/ubuntu/tomcat11?arch=source&distro=resoluteOther threats | 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
A fix is available. Users should upgrade affected Apache Tomcat installations to versions 11.0.23, 10.1.56, or 9.0.119 or later. Ubuntu users should apply the security updates provided in the Ubuntu Security Notice USN-8551-1, which includes patched packages for supported Ubuntu releases. Standard system updates will apply the necessary fixes. No additional action is required beyond applying these updates.
Description
A cross-site scripting (XSS) vulnerability exists in the number guess example application of Apache Tomcat. This vulnerability is due to improper neutralization of script-related HTML tags, allowing an attacker to inject malicious scripts. The issue affects multiple versions of Apache Tomcat, including versions from 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.118, 10.1.0-M1 through 10.1.55, and 11.0.0-M1 through 11.0.22. Fixed versions have been released, and users are advised to upgrade to 11.0.23, 10.1.56, or 9.0.119 or later to remediate the issue. The vulnerability has a CVSS score of 6.1 (medium severity).
References
- ubuntu.com/security/CVE-2026-50229 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-50229 (opens in a new tab)
- github.com/apache/tomcat/commit/1fe95d841e9d461a16069974142d12c3ef68819a (opens in a new tab)
- github.com/apache/tomcat/commit/0d5bdd5b0dd964e9f73e530b7d753462b9bfd1d0 (opens in a new tab)
- github.com/apache/tomcat/commit/de5a950415fc67713f17fab63d0c7809e0fca80b (opens in a new tab)
- lists.apache.org/thread/wlt2no8bw45zl1w8byop4zfqphldf5j0 (opens in a new tab)
- openwall.com/lists/oss-security/2026/06/29/20 (opens in a new tab)
- ubuntu.com/security/notices/USN-8551-1 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-50229 (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_21329-1.json (opens in a new tab)
- bugzilla.suse.com/1232390 (opens in a new tab)
- bugzilla.suse.com/1269791 (opens in a new tab)
- bugzilla.suse.com/1269824 (opens in a new tab)
- bugzilla.suse.com/1269907 (opens in a new tab)
- bugzilla.suse.com/1269908 (opens in a new tab)
- bugzilla.suse.com/1269909 (opens in a new tab)
- bugzilla.suse.com/1269910 (opens in a new tab)
- suse.com/security/cve/CVE-2026-50229/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-53404/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-53434/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-55276/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-55955/ (opens in a new tab)
- suse.com/security/cve/CVE-2026-55956/ (opens in a new tab)