CVE-2026-48838

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:patchstack, epss, ghsa
Trending — 3 sources updated this week
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

Unauthenticated Cross Site Scripting (XSS) in Post SMTP <= 3.6.2 versions.

CVSS v3
7.1
EG Score
7.1(high)
EPSS
14.7%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

References (1)

Vendor Advisories for CVE-2026-48838(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 30× in last 7d / 110× 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 110 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48838?
CVE-2026-48838 is a high vulnerability published on June 15, 2026. Unauthenticated Cross Site Scripting (XSS) in Post SMTP <= 3.6.2 versions.
When was CVE-2026-48838 disclosed?
CVE-2026-48838 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48838 actively exploited?
CVE-2026-48838 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48838?
CVE-2026-48838 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-48838?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48838, 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

Explore the affected products and dependency analysis for CVE-2026-48838

Explore →

Is Your Infrastructure Affected by CVE-2026-48838?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs