Auth bypass in Simalexan Api-Lambda-Send-Email-Ses
CVE-2026-90513
A flaw has been found in simalexan api-lambda-send-email-ses up to bda6869aa81371d1e872242e74fe7d953edb818d. This issue affects the function SES.sendEmail of the file template.yml of the component API Gateway Endpoint. This manipulation of the argument toEmails/ccEmails/replyToEmails/subject/message causes missing authentication. It is possible to initiate the attack remotely. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (55.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Simalexan Api-Lambda-Send-Email-Ses — versions bda6869aa81371d1e872242e74fe7d953edb818d
Weakness classification (CWE)
References
- vuldb.com/vuln/403100 (technical-description, vdb-entry)
- vuldb.com/vuln/403100/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90513 (third-party-advisory)
- vuldb.com/submit/911886 (third-party-advisory)
- github.com/simalexan/api-lambda-send-email-ses/issues/9 (issue-tracking)
- github.com/simalexan/api-lambda-send-email-ses/ (product)
Frequently asked questions
- What is CVE-2026-90513?
- CVE-2026-90513 is a medium-severity vulnerability in Simalexan Api-Lambda-Send-Email-Ses, classified under Improper Authentication. CVSS score: 6.5/10. Published 2026-09-13.
- How severe is CVE-2026-90513?
- Medium severity. CVSS v3 base score is 6.5 out of 10.