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VulnerabilityPublished

CVE-2026-50229: Apache Tomcat · Basic XSS

Affects Apache TomcatSource CVE Database V5

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Exposed hosts seen by OffSeq Mirage · public detection template (Nuclei) · CVSS 6.1 Medium : upgrade to 8.5.101 or 7.0.110 when convenient.

Data as of 11 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
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 8.5.101, 7.0.110
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jun 2026

  2. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq 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), GitHub proofs of concept, OffSeq Mirage (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade org.apache.tomcat/tomcat to 8.5.101 or 7.0.110.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache TomcatAffected
  • >=11.0.0-M1 <=11.0.22
  • >=10.1.0-M1 <=10.1.55
  • >=9.0.0.M1 <=9.0.118
  • >=8.5.0 <=8.5.100
  • >=7.0.0 <=7.0.109
Fixed in–
Mavenorg.apache.tomcat/tomcatpkg:maven/org.apache.tomcat/tomcatOther threatsAffected
  • =8.5.0 >=8.5.0 <8.5.101
  • =7.0.0 >=7.0.0 <7.0.110
Fixed in
  • 8.5.101
  • 7.0.110

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade affected Apache Tomcat versions to 11.0.23, 10.1.56, 9.0.119, or later versions where the vulnerability is fixed. No official temporary or alternative mitigations are indicated. Patch status is confirmed by the vendor's recommended upgrade versions. Users should verify their Tomcat version and apply the upgrade accordingly.

Description

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.

References

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