CVE-2026-50229

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-06-29. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 6.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
90%
KEV
Not listed

Published

June 29, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-50229: Apache Tomcat: XSS in number guess example

http://www.openwall.com/lists/oss-security/2026/06/29/20
generic
https://lists.apache.org/thread/wlt2no8bw45zl1w8byop4zfqphldf5j0

Vendor Advisories for CVE-2026-50229(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntutomcat8-user (8.0.32-1ubuntu1.13+esm2) @ xenial2026-08-20ubuntu
redhattomcat11-main-11.0.23-0.1.hum12026-06-29redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 4 ecosystems)
Debian:13(3)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.40-1 ... 10.1.55-1~deb13u1 (10 versions)——
tomcat1111.0.11-1 ... 11.0.6-1 (10 versions)——
tomcat9—9.0.70-2—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.40-1 ... 10.1.55-1~deb13u1 (10 versions)——
tomcat1111.0.11-1 ... 11.0.6-1 (9 versions)11.0.24-1—
tomcat9—9.0.70-2—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.10-1 ... 10.1.9-1 (36 versions)——
tomcat9—9.0.70-2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
tomcat99.0.43-1 ... 9.0.70-1 (28 versions)9.0.70-2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 25× in last 7d / 97× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 161 total refreshes for this CVE.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 08:49 UTCEG score recompute
  3. 2026-08-20 08:49 UTCVendor advisory
  4. 2026-08-20 08:49 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 07:41 UTCEG score recompute
  7. 2026-08-19 07:41 UTCVendor advisory
  8. 2026-08-19 07:41 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-18 06:29 UTCEG score recompute
  11. 2026-08-18 06:29 UTCVendor advisory
  12. 2026-08-18 06:29 UTCGHSA enrichment
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-16 21:39 UTCEG score recompute
  15. 2026-08-16 21:39 UTCVendor advisory
  16. 2026-08-16 21:39 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 20:31 UTCEG score recompute
  20. 2026-08-15 20:31 UTCVendor advisory
  21. 2026-08-15 20:31 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-14 19:24 UTCEG score recompute
  24. 2026-08-14 19:24 UTCVendor advisory
  25. 2026-08-14 19:24 UTCGHSA enrichment
Show 75 more
  1. 2026-08-13 22:00 UTCEPSS rescore
  2. 2026-08-13 18:16 UTCVendor advisory
  3. 2026-08-13 18:16 UTCGHSA enrichment
  4. 2026-08-12 16:08 UTCEG score recompute
  5. 2026-08-12 16:08 UTCVendor advisory
  6. 2026-08-12 16:08 UTCGHSA enrichment
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-11 14:54 UTCEG score recompute
  9. 2026-08-11 14:54 UTCVendor advisory
  10. 2026-08-11 14:54 UTCGHSA enrichment
  11. 2026-08-11 00:00 UTCEPSS rescore
  12. 2026-08-10 13:47 UTCEG score recompute
  13. 2026-08-10 13:47 UTCVendor advisory
  14. 2026-08-10 13:47 UTCGHSA enrichment
  15. 2026-08-09 13:46 UTCEPSS rescore
  16. 2026-08-09 12:40 UTCEG score recompute
  17. 2026-08-09 12:40 UTCVendor advisory
  18. 2026-08-09 12:40 UTCGHSA enrichment
  19. 2026-08-08 16:37 UTCEPSS rescore
  20. 2026-08-08 11:32 UTCEG score recompute
  21. 2026-08-08 11:32 UTCVendor advisory
  22. 2026-08-08 11:32 UTCGHSA enrichment
  23. 2026-08-07 10:24 UTCEG score recompute
  24. 2026-08-07 10:24 UTCVendor advisory
  25. 2026-08-07 10:24 UTCGHSA enrichment
  26. 2026-08-06 13:47 UTCEPSS rescore
  27. 2026-08-06 09:16 UTCEG score recompute
  28. 2026-08-06 09:16 UTCVendor advisory
  29. 2026-08-06 09:15 UTCGHSA enrichment
  30. 2026-08-05 19:17 UTCEPSS rescore
  31. 2026-08-05 08:08 UTCEG score recompute
  32. 2026-08-05 08:08 UTCVendor advisory
  33. 2026-08-05 08:08 UTCGHSA enrichment
  34. 2026-08-04 15:10 UTCEPSS rescore
  35. 2026-08-04 10:39 UTCEPSS rescore
  36. 2026-08-04 05:29 UTCEG score recompute
  37. 2026-08-04 05:29 UTCVendor advisory
  38. 2026-08-04 05:29 UTCGHSA enrichment
  39. 2026-08-03 10:36 UTCEPSS rescore
  40. 2026-08-03 04:20 UTCVendor advisory
  41. 2026-08-03 04:20 UTCGHSA enrichment
  42. 2026-08-02 03:13 UTCEG score recompute
  43. 2026-08-02 03:13 UTCVendor advisory
  44. 2026-08-02 03:13 UTCGHSA enrichment
  45. 2026-08-02 02:27 UTCEPSS rescore
  46. 2026-08-01 04:16 UTCEPSS rescore
  47. 2026-08-01 02:06 UTCVendor advisory
  48. 2026-08-01 02:06 UTCGHSA enrichment
  49. 2026-07-30 23:44 UTCEG score recompute
  50. 2026-07-30 23:44 UTCVendor advisory
  51. 2026-07-30 23:44 UTCGHSA enrichment
  52. 2026-07-30 16:28 UTCEPSS rescore
  53. 2026-07-30 01:30 UTCEPSS rescore
  54. 2026-07-29 22:36 UTCEG score recompute
  55. 2026-07-29 22:36 UTCVendor advisory
  56. 2026-07-29 22:36 UTCGHSA enrichment
  57. 2026-07-28 19:42 UTCEG score recompute
  58. 2026-07-28 19:42 UTCVendor advisory
  59. 2026-07-28 19:42 UTCGHSA enrichment
  60. 2026-07-28 15:37 UTCEPSS rescore
  61. 2026-07-27 16:52 UTCEG score recompute
  62. 2026-07-27 16:52 UTCVendor advisory
  63. 2026-07-27 16:52 UTCGHSA enrichment
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 13:57 UTCEG score recompute
  66. 2026-07-26 13:57 UTCVendor advisory
  67. 2026-07-26 13:57 UTCGHSA enrichment
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-24 14:18 UTCEPSS rescore
  70. 2026-07-23 14:18 UTCEPSS rescore
  71. 2026-07-23 03:18 UTCEG score recompute
  72. 2026-07-22 14:08 UTCEPSS rescore
  73. 2026-07-21 15:25 UTCEPSS rescore
  74. 2026-07-20 17:08 UTCEPSS rescore
  75. 2026-07-19 14:31 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-50229.yaml
    First seen Jan 1, 2026

    Apache Tomcat - Cross-Site Scripting

    Open source ↗

Frequently asked(5)

What is CVE-2026-50229?
CVE-2026-50229 is a medium vulnerability published on June 29, 2026. 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,…
When was CVE-2026-50229 disclosed?
CVE-2026-50229 was first published in the National Vulnerability Database on June 29, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50229 actively exploited?
CVE-2026-50229 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 9.7% of all scored CVEs.
What is the CVSS score of CVE-2026-50229?
CVE-2026-50229 has a CVSS v3.1 base score of 6.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-50229?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50229, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-50229

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