What is CVE-2026-15191?

CVE-2026-15191 is a medium-severity vulnerability in Mettle Sendportal, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-07-09.

How severe is CVE-2026-15191?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Auth bypass in Mettle Sendportal

CVE-2026-15191

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.

Published 2026-07-09 · last modified 2026-09-03.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (30.3th percentile), scored 2026-10-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Mettle Sendportal — versions 3.0.0, 3.0.1

Weakness classification (CWE)

References

vuldb.com/vuln/377117 (vdb-entry)
vuldb.com/vuln/377117/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-15191 (third-party-advisory)
vuldb.com/submit/851622 (third-party-advisory)
github.com/mettle/sendportal/issues/339 (issue-tracking, exploit)
github.com/mettle/sendportal/ (product)

Frequently asked questions

What is CVE-2026-15191?: CVE-2026-15191 is a medium-severity vulnerability in Mettle Sendportal, classified under Improper Authorization. CVSS score: 6.3/10. Published 2026-07-09.
How severe is CVE-2026-15191?: Medium severity. CVSS v3 base score is 6.3 out of 10.