CVE-2026-26483

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-07-20. 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 — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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

Mettle SendPortal 3.0.1 and earlier contains a stored cross-site scripting (XSS) vulnerability in the template management functionality. The application fails to properly sanitize user-supplied input in the content parameter of the /templates endpoint, allowing an attacker to persistently inject malicious JavaScript code that is executed in the browsers of users who access the affected template.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
No patch confirmed yet.
generic

GitHub - mettle/sendportal: Open-source self-hosted email marketing. Manage your own newsletters at a fraction of the cost. · GitHub

https://github.com/mettle/sendportal
generic

CVE-2026-26483 · GitHub

https://gist.github.com/WinBlah12/8dbc1eae788945c6ea6ab1a2cdfd7cb1

Vendor Advisories for CVE-2026-26483(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 17× in last 7d / 81× 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 114 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-26483?
CVE-2026-26483 is a medium vulnerability published on July 20, 2026. Mettle SendPortal 3.0.1 and earlier contains a stored cross-site scripting (XSS) vulnerability in the template management functionality. The application fails to properly sanitize user-supplied input in the content parameter of the /templates endpoint, allowing an attacker to persistently inject…
When was CVE-2026-26483 disclosed?
CVE-2026-26483 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26483 actively exploited?
CVE-2026-26483 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.2% of all scored CVEs.
What is the CVSS score of CVE-2026-26483?
CVE-2026-26483 has a CVSS v3.1 base score of 6.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-26483?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26483, 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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