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CVE-2026-44308

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

MEDIUM
6.3
CVSS Score
Published: May 14, 2026 at 02:39 PM UTC
Updated: October 26, 2026 at 02:10 PM UTC
2 products affected across 2 vendorsSpring Cloud AWS SNSSpring Cloud AWS

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Cloud AWS· Awspring
90%
3.0.0 ≤ v < 4.0.23.0.0
Affected range stops below 4.0.2, so it looks safe — our inference, not a vendor statement
Spring Cloud AWS SNS· Io Awspring Cloud
90%
3.0.0 ≤ v < 4.0.23.0.0
Affected range stops below 4.0.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-345

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