Public proof of conceptFix available

CVE-2026-50229

Q: Is CVE-2026-50229 actively exploited?

Active exploitation of CVE-2026-50229 has not been confirmed. Its EPSS score was 4.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-50229?

CVE-2026-50229 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

A public proof of concept exists; no exploitation attested.

Published2026-06-29
Fixed in11.0.23 · 10.1.56 · 9.0.119
WeaknessCWE-80

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-06-2921:16CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-50229?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-50229?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache Tomcat

Branch	Affected	Fixed in	Source
11.0	≥ 11.0.0, < 11.0.23	11.0.23	NVD
10.1	≥ 10.1.0, < 10.1.56	10.1.56	NVD
9.0	≥ 9.0.0, < 9.0.119	9.0.119	NVD
7.0	≤ 7.0.109	no fix published	NVD
8.5	≥ 8.5.0, ≤ 8.5.100	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

RHSA-2026:68651 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat9 security update
RHSA-2026:68677 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat security update
RHSA-2026:68660 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat security, bug fix, and enhancement update
RHSA-2026:68659 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat security update
RHSA-2026:68678 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat security update
RHSA-2026:68679 Red Hat Product Security9 products fixed
Red Hat Security Advisory: tomcat security update

2 more advisories

Full record on NVD

Fix

Update Apache Tomcat to 11.0.23 · 10.1.56 · 9.0.119
Vendor fix Red Hat Product Security RHSA-2026:68651 · 9 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround from the vendor Red Hat Product Security RHSA-2026:68651 · 9 productsRemove or disable the Tomcat example web applications if they are deployed. Example applications are not needed for production use and should not be accessible in production environments.

Advisories and patches

lists.apache.orgVendor Advisory

Detection

read 2026-10-23 19:25 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedqsuv/CVE-2026-50229

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-06-30
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.16.12026-06-30
CNAweakness (CWE)CWE-80read 2026-10-23
FIRST EPSSEPSS score4.1 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2026-06-29
Last Modified: 2026-07-02
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-50229?

Is CVE-2026-50229 actively exploited?

Active exploitation of CVE-2026-50229 has not been confirmed. Its EPSS score was 4.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-50229?

CVE-2026-50229 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Running Apache Tomcat? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database