CVE-2026-15191

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH 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 — 5 sources updated this week
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.3Exploit: NoneExposed: 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(high)
EPSS
12.4%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 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 11× in last 7d / 11× 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. 2026-07-12 18:20 UTCEG score recompute
  2. 2026-07-12 18:20 UTCGHSA enrichment
  3. 2026-07-12 05:46 UTCEPSS rescore
  4. 2026-07-11 17:43 UTCEG score recompute
  5. 2026-07-11 17:43 UTCGHSA enrichment
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-10 17:06 UTCEG score recompute
  8. 2026-07-10 17:06 UTCGHSA enrichment
  9. 2026-07-09 17:54 UTCNVD updateCVSS v4 → 2.1
  10. 2026-07-09 16:28 UTCEG score recompute
  11. 2026-07-09 16:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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. 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 12.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-15191

Explore →

Is Your Infrastructure Affected by CVE-2026-15191?

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

Start Free Scan →Browse All CVEs