CVE-2026-40992

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreHIGH confidence

Score 5.0 from GitHub Security Advisory published 2026-06-11. a secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.0Exploit: NoneExposed: 0

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

Spring Boot's Mail auto-configuration does not enable hostname verification. Applications that set the relevant JavaMail property, such as spring.mail.properties.mail.smtp.ssl.checkserveridentity=true, are not affected.

Affected versions: Spring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16.

CVSS v3
5.0
EG Score
5.0(high)
EPSS
2.5%
KEV
Not listed

Published

June 11, 2026

Last Modified

June 23, 2026

Advisory Details (1)

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

CVE-2026-40992: Mail Auto-Configuration Does Not Enable SSL Hostname Verification

https://spring.io/security/cve-2026-40992

Vendor Advisories for CVE-2026-40992(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 79× 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.

  1. 2026-07-07 03:21 UTCEG score recompute
  2. 2026-07-07 03:21 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-05 20:30 UTCEG score recompute
  6. 2026-07-05 20:30 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 19:18 UTCEG score recompute
  9. 2026-07-04 19:18 UTCGHSA enrichment
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-03 17:16 UTCEG score recompute
  12. 2026-07-03 17:15 UTCGHSA enrichment
  13. 2026-07-02 16:03 UTCEG score recompute
  14. 2026-07-02 16:03 UTCGHSA enrichment
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-07-01 14:52 UTCEG score recompute
  17. 2026-07-01 14:52 UTCGHSA enrichment
  18. 2026-06-30 23:22 UTCEPSS rescore
  19. 2026-06-30 13:40 UTCEG score recompute
  20. 2026-06-30 13:40 UTCGHSA enrichment
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 08:50 UTCEG score recompute
  23. 2026-06-29 08:50 UTCGHSA enrichment
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 07:38 UTCEG score recompute
Show 54 more
  1. 2026-06-28 07:38 UTCGHSA enrichment
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 06:28 UTCEG score recompute
  4. 2026-06-27 06:28 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-26 05:05 UTCEG score recompute
  7. 2026-06-26 05:05 UTCGHSA enrichment
  8. 2026-06-25 13:49 UTCEPSS rescore
  9. 2026-06-25 13:49 UTCEPSS rescore
  10. 2026-06-25 03:53 UTCEG score recompute
  11. 2026-06-25 03:53 UTCGHSA enrichment
  12. 2026-06-24 14:05 UTCEPSS rescore
  13. 2026-06-24 02:42 UTCEG score recompute
  14. 2026-06-24 02:42 UTCGHSA enrichment
  15. 2026-06-23 21:33 UTCEPSS rescore
  16. 2026-06-23 01:30 UTCEG score recompute
  17. 2026-06-23 01:30 UTCGHSA enrichment
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-22 00:19 UTCEG score recompute
  21. 2026-06-22 00:19 UTCGHSA enrichment
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 14:56 UTCEPSS rescore
  24. 2026-06-21 01:59 UTCEPSS rescore
  25. 2026-06-20 21:10 UTCEG score recompute
  26. 2026-06-20 21:10 UTCGHSA enrichment
  27. 2026-06-19 19:28 UTCEG score recompute
  28. 2026-06-19 19:28 UTCGHSA enrichment
  29. 2026-06-19 19:25 UTCEPSS rescore
  30. 2026-06-18 18:17 UTCEG score recompute
  31. 2026-06-18 18:17 UTCGHSA enrichment
  32. 2026-06-18 17:52 UTCEPSS rescore
  33. 2026-06-18 17:52 UTCEPSS rescore
  34. 2026-06-17 17:53 UTCEPSS rescore
  35. 2026-06-17 17:02 UTCEG score recompute
  36. 2026-06-17 17:01 UTCGHSA enrichment
  37. 2026-06-16 17:52 UTCEPSS rescore
  38. 2026-06-16 15:10 UTCEG score recompute
  39. 2026-06-16 15:10 UTCGHSA enrichment
  40. 2026-06-15 17:49 UTCEPSS rescore
  41. 2026-06-15 13:57 UTCEG score recompute
  42. 2026-06-15 13:57 UTCGHSA enrichment
  43. 2026-06-14 12:46 UTCEG score recompute
  44. 2026-06-14 12:45 UTCGHSA enrichment
  45. 2026-06-13 23:00 UTCEPSS rescore
  46. 2026-06-13 11:34 UTCEG score recompute
  47. 2026-06-13 11:34 UTCGHSA enrichment
  48. 2026-06-12 23:12 UTCEPSS rescore
  49. 2026-06-12 23:12 UTCEPSS rescore
  50. 2026-06-12 10:23 UTCEG score recompute
  51. 2026-06-12 10:22 UTCGHSA enrichment
  52. 2026-06-11 14:00 UTCEPSS rescore
  53. 2026-06-11 09:11 UTCEG score recompute
  54. 2026-06-11 09:10 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40992?
CVE-2026-40992 is a medium vulnerability published on June 11, 2026. Spring Boot's Mail auto-configuration does not enable hostname verification. Applications that set the relevant JavaMail property, such as spring.mail.properties.mail.smtp.ssl.checkserveridentity=true, are not affected. Affected versions: Spring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0…
When was CVE-2026-40992 disclosed?
CVE-2026-40992 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40992 actively exploited?
CVE-2026-40992 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40992?
CVE-2026-40992 has a CVSS v3 base score of 5.0 (NVD).
How do I remediate CVE-2026-40992?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40992, 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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