CVE-2026-44308
Spring Cloud AWS: Missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Spring Cloud AWS: Missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
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.
- Record
CVE-2026-44308- CVSS 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 - Weakness
- CWE-345
- Updated
- 2026-11-02
EUVDEUVD-2026-30302
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.
- Record
EUVD-2026-30302- CVSS 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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-r4w4-wv68-qv85
Spring Cloud AWS missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
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 HandlerInterceptor before the request reaches the controller, using SnsMessageManager from the AWS SDK v2 sns-message-manager module.
Resources
- AWS SNS: Verifying the signatures of Amazon SNS messages (https://docs.aws.amazon.com/sns/latest/dg/sns-verify-signature-of-message.html)
- AWS SDK for Java v2: SnsMessageManager (https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/messagemanager/sns/SnsMessageManager.html)
- Fix PR: #1614
- Record
GHSA-r4w4-wv68-qv85- CVSS 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 - Weakness
- CWE-345
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-44308- CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-345
- Updated
- 2026-11-02
OSV
Spring Cloud AWS: Missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
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.
- Record
CVE-2026-44308- CVSS 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 - Weakness
- CWE-345
- Updated
- 2026-11-02
OSVGHSA-r4w4-wv68-qv85
Spring Cloud AWS missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
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 HandlerInterceptor before the request reaches the controller, using SnsMessageManager from the AWS SDK v2 sns-message-manager module.
Resources
- AWS SNS: Verifying the signatures of Amazon SNS messages (https://docs.aws.amazon.com/sns/latest/dg/sns-verify-signature-of-message.html)
- AWS SDK for Java v2: SnsMessageManager (https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/messagemanager/sns/SnsMessageManager.html)
- Fix PR: #1614
- Record
GHSA-r4w4-wv68-qv85- CVSS 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 - Weakness
- CWE-345
- Updated
- 2026-11-02
OSVROOT-APP-MAVEN-CVE-2026-44308 No score
CVE-2026-44308 in io.root.io.awspring.cloud:spring-cloud-aws-sns - Patched by Root
Root has patched CVE-2026-44308 in the io.root.io.awspring.cloud:spring-cloud-aws-sns package for Root:Maven. Multiple fixed versions available.
- Record
ROOT-APP-MAVEN-CVE-2026-44308- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
io.awspring.cloud:spring-cloud-aws-snsMaven |
4.0.0 up to 4.0.2 | 4.0.2 |
io.awspring.cloud:spring-cloud-aws-snsMaven |
3.0.0 to 3.4.2 | None known |
io.awspring.cloud:spring-cloud-aws-snsMaven |
4.0.0 up to 4.0.2, plus listed versions 4.0.1 |
4.0.2 |
io.awspring.cloud:spring-cloud-aws-snsMaven |
3.0.0 to 3.4.2, plus listed versions 3.0.13.0.23.0.33.0.43.0.5 Show 11 moreShow less3.1.03.1.13.2.03.2.0-M13.2.13.3.03.3.0-M13.3.0-RC13.3.13.4.03.4.1 |
None known |
io.root.io.awspring.cloud:spring-cloud-aws-snsRoot:Maven |
before 3.3.0-root.io.1 | 3.3.0-root.io.1 |
io.awspring.cloud:spring-cloud-aws-snsRoot:Maven |
before 3.3.0-aikido.1 | 3.3.0-aikido.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-44308 is a medium vulnerability (CVSS 6.3) in Awspring Spring-cloud-aws, published May 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 7th percentile. Fixed in io.awspring.cloud:spring-cloud-aws-sns 4.0.2.
References
github.com/awspring/spring-cloud-aws/security/advisories/GHSA-r4w4-wv68-qv85
nvd.nist.gov/vuln/detail/CVE-2026-44308