CVE-2026-90513 simalexan api-lambda-send-email-ses API Gateway Endpoint template.yml SES.sendEmail missing authentication
Attackers can send emails via the API Gateway endpoint without authentication, allowing unauthorized message dispatch and potential data exposure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90513?
CVE-2026-90513 is a medium-severity missing authorization vulnerability in simalexan api-lambda-send-email-ses, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-90513?
How do I fix CVE-2026-90513?
No fix has been published for CVE-2026-90513 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-90513 being exploited?
There is no known exploitation of CVE-2026-90513 in the wild and no public exploit code.
Sources
Also known as GHSA-4cj2-3xxr-fv5p.