Medium, CVSS 6.3MavenPublished
Spring Cloud AWS missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
CVE-2026-44308 · GHSA-r4w4-wv68-qv85
- Affected
- Maven io.awspring.cloud:spring-cloud-aws-sns >= 4.0.0, < 4.0.2; >= 3.0.0, <= 3.4.2
- Fixed in
- 4.0.2· Partial vendor fix
- Issue
- Impact Applications using Spring Cloud AWS SNS HTTP/HTTPS endpoint support (@NotificationMessageMapping, @NotificationSubscriptionMapping, @NotificationUnsubscribeConfirmationMapping) did not verify the signature of incoming SNS messages. An unauthenticated attacker who knows the endpoint URL could send crafted HTTP POST requests mimicking SNS Notification or SubscriptionConfirmation messages, causing the application to: - Process arbitrary payloads as if they were legitimate SNS notifications. - Auto-confirm subscriptions or unsubscribe from attacker-controlled topics. Affected versions: 3.0.0 through 3.4.2, 4.0.0, and 4.0.1. The 3.x line will not receive a fix; users on 3.x should apply the workaround below or upgrade to 4.0.2. Patches Fixed in Spring Cloud AWS 4.0.2. When using Spring Boot auto-configuration, signature verification is enabled by default. Users should upgrade to 4.0.2. Workarounds Manually verify the SNS message signature in a servlet filter or Spring…
Recommended action: Upgrade to 4.0.2; some affected versions have no fix yet, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.