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) @ xenial2026-09-18ubuntu
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 10× in last 7d / 52× 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 212 total refreshes for this CVE.

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

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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