CVE-2026-15191

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-07-09. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

A flaw has been found in mettle sendportal up to 3.0.1. This vulnerability affects unknown code of the file vendor/mettle/sendportal-core/src/Http/Requests/CampaignStoreRequest.php of the component Campaign Creation Endpoint. Executing a manipulation can lead to authorization bypass. The attack can be executed remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

July 9, 2026

Last Modified

September 3, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. 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🟡 PoC Available

Security: Cross-Tenant Authorization Bypass Allows Campaigns to Reference Another Workspace's Email Service · Issue #339 · mettle/sendportal · GitHub

https://github.com/mettle/sendportal/issues/339

Vendor Advisories for CVE-2026-15191(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 7× in last 7d / 48× 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 153 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-15191?
CVE-2026-15191 is a medium vulnerability published on July 9, 2026. A flaw has been found in mettle sendportal up to 3.0.1. This vulnerability affects unknown code of the file vendor/mettle/sendportal-core/src/Http/Requests/CampaignStoreRequest.php of the component Campaign Creation Endpoint. Executing a manipulation can lead to authorization bypass. The attack can…
When was CVE-2026-15191 disclosed?
CVE-2026-15191 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15191 actively exploited?
CVE-2026-15191 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 67.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15191?
CVE-2026-15191 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-15191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15191, 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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