CVE-2026-44308

Spring Cloud AWS: Missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications

State: Published
Severity: 6.3 Medium
Published: May 14, 2026
Updated: May 14, 2026
Reserved: May 5, 2026

Description

Spring Cloud AWS simplifies using AWS managed services in a Spring and Spring Boot applications. From 3.0.0 to 4.0.1, pplications 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. This vulnerability is fixed in 4.0.2.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-345 Insufficient Verification of Data Authenticity

Affected Products

Product	Versions
spring-cloud-awsawspring	>= 3.0.0, < 4.0.2Affected
spring-cloud-aws-snsio.awspring.cloud	>= 3.0.0, < 4.0.2Affected

References

https://github.com/awspring/spring-cloud-aws/security/advisories/GHSA-r4w4-wv68-qv85

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.