CVE-2026-12200

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-06-15. the CNA's CVSS baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vuldb, epss, ghsa
Trending — 3 sources updated this week
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A security vulnerability has been detected in Ritlabs TinyWeb Server up to 1.94 on Win32. This impacts an unknown function in the library libeay32.dll.html of the component Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
7.3
EG Score
7.3(high)
EPSS
24.3%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

Stack Overflow, but the largest byte is 3F | Nathan's Blog

https://nathan2.com/posts/tinyweb/

Vendor Advisories for CVE-2026-12200(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 32× in last 7d / 119× 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 119 total refreshes for this CVE.

  1. 2026-07-07 00:33 UTCEG score recompute
  2. 2026-07-07 00:33 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 20:41 UTCEG score recompute
  6. 2026-07-05 20:40 UTCGHSA enrichment
  7. 2026-07-05 09:27 UTCEG score recompute
  8. 2026-07-05 09:27 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 21:38 UTCEG score recompute
  12. 2026-07-04 21:38 UTCGHSA enrichment
  13. 2026-07-04 10:10 UTCEG score recompute
  14. 2026-07-04 10:10 UTCGHSA enrichment
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-03 14:21 UTCEG score recompute
  17. 2026-07-03 14:21 UTCGHSA enrichment
  18. 2026-07-03 01:29 UTCEG score recompute
  19. 2026-07-03 01:29 UTCGHSA enrichment
  20. 2026-07-02 14:16 UTCEG score recompute
  21. 2026-07-02 14:16 UTCGHSA enrichment
  22. 2026-07-02 03:05 UTCEG score recompute
  23. 2026-07-02 03:05 UTCGHSA enrichment
  24. 2026-07-01 15:54 UTCEG score recompute
  25. 2026-07-01 15:54 UTCGHSA enrichment
Show 75 more
  1. 2026-07-01 15:06 UTCEPSS rescore
  2. 2026-07-01 15:06 UTCEPSS rescore
  3. 2026-07-01 04:43 UTCEG score recompute
  4. 2026-07-01 04:42 UTCGHSA enrichment
  5. 2026-06-30 23:22 UTCEPSS rescore
  6. 2026-06-30 17:30 UTCEG score recompute
  7. 2026-06-30 17:30 UTCGHSA enrichment
  8. 2026-06-30 05:47 UTCEG score recompute
  9. 2026-06-30 05:47 UTCGHSA enrichment
  10. 2026-06-29 18:36 UTCEG score recompute
  11. 2026-06-29 18:36 UTCGHSA enrichment
  12. 2026-06-29 07:14 UTCEG score recompute
  13. 2026-06-29 07:13 UTCGHSA enrichment
  14. 2026-06-28 19:57 UTCEG score recompute
  15. 2026-06-28 19:57 UTCGHSA enrichment
  16. 2026-06-28 14:07 UTCEPSS rescore
  17. 2026-06-28 08:45 UTCEG score recompute
  18. 2026-06-28 08:45 UTCGHSA enrichment
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-27 21:34 UTCEG score recompute
  22. 2026-06-27 21:34 UTCGHSA enrichment
  23. 2026-06-27 10:23 UTCEG score recompute
  24. 2026-06-27 10:23 UTCGHSA enrichment
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-26 23:10 UTCEG score recompute
  27. 2026-06-26 23:10 UTCGHSA enrichment
  28. 2026-06-26 11:59 UTCEG score recompute
  29. 2026-06-26 11:59 UTCGHSA enrichment
  30. 2026-06-25 22:57 UTCEG score recompute
  31. 2026-06-25 22:57 UTCGHSA enrichment
  32. 2026-06-25 13:49 UTCEPSS rescore
  33. 2026-06-25 11:44 UTCEG score recompute
  34. 2026-06-25 11:44 UTCGHSA enrichment
  35. 2026-06-25 00:33 UTCEG score recompute
  36. 2026-06-25 00:33 UTCGHSA enrichment
  37. 2026-06-24 14:05 UTCEPSS rescore
  38. 2026-06-24 13:22 UTCEG score recompute
  39. 2026-06-24 13:22 UTCGHSA enrichment
  40. 2026-06-24 00:45 UTCEG score recompute
  41. 2026-06-24 00:45 UTCGHSA enrichment
  42. 2026-06-23 21:32 UTCEPSS rescore
  43. 2026-06-23 13:30 UTCEG score recompute
  44. 2026-06-23 13:30 UTCGHSA enrichment
  45. 2026-06-23 02:17 UTCEG score recompute
  46. 2026-06-23 02:16 UTCGHSA enrichment
  47. 2026-06-22 15:05 UTCEG score recompute
  48. 2026-06-22 15:05 UTCGHSA enrichment
  49. 2026-06-22 15:01 UTCGHSA enrichment
  50. 2026-06-22 14:25 UTCEPSS rescore
  51. 2026-06-22 14:25 UTCEPSS rescore
  52. 2026-06-22 03:49 UTCEG score recompute
  53. 2026-06-22 03:49 UTCGHSA enrichment
  54. 2026-06-21 15:07 UTCEG score recompute
  55. 2026-06-21 15:07 UTCGHSA enrichment
  56. 2026-06-21 14:56 UTCEPSS rescore
  57. 2026-06-21 14:56 UTCEPSS rescore
  58. 2026-06-21 03:28 UTCEG score recompute
  59. 2026-06-21 03:28 UTCGHSA enrichment
  60. 2026-06-21 02:31 UTCMITRE cvelistV5CVSS v4 → 6.9
  61. 2026-06-21 01:59 UTCEPSS rescore
  62. 2026-06-21 01:59 UTCEPSS rescore
  63. 2026-06-20 16:15 UTCEG score recompute
  64. 2026-06-20 16:15 UTCGHSA enrichment
  65. 2026-06-20 04:59 UTCEG score recompute
  66. 2026-06-20 04:58 UTCGHSA enrichment
  67. 2026-06-19 19:25 UTCEPSS rescore
  68. 2026-06-19 17:34 UTCEG score recompute
  69. 2026-06-19 17:33 UTCGHSA enrichment
  70. 2026-06-19 05:58 UTCEG score recompute
  71. 2026-06-19 05:57 UTCGHSA enrichment
  72. 2026-06-18 18:16 UTCEG score recompute
  73. 2026-06-18 18:16 UTCGHSA enrichment
  74. 2026-06-18 17:52 UTCEPSS rescore
  75. 2026-06-18 07:02 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12200?
CVE-2026-12200 is a high vulnerability published on June 15, 2026. A security vulnerability has been detected in Ritlabs TinyWeb Server up to 1.94 on Win32. This impacts an unknown function in the library libeay32.dll.html of the component Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack can be…
When was CVE-2026-12200 disclosed?
CVE-2026-12200 was first published in the National Vulnerability Database on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12200 actively exploited?
CVE-2026-12200 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12200?
CVE-2026-12200 has a CVSS v4.0 base score of 7.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-12200?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12200, 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

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