Vulnerability-Lookup

CVE-2026-44308 (GCVE-0-2026-44308)

Vulnerability from cvelistv5 – Published: 2026-05-14 14:39 – Updated: 2026-05-14 18:08

Title

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

Summary

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.

Severity

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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-345 - Insufficient Verification of Data Authenticity

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/awspring/spring-cloud-aws/secu…	x_refsource_CONFIRM

Impacted products

2 products

Vendor	Product	Version
awspring	spring-cloud-aws	Affected: >= 3.0.0, < 4.0.2
io.awspring.cloud	spring-cloud-aws-sns	Affected: >= 3.0.0, < 4.0.2

Show details on NVD website

JSON

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FKIE_CVE-2026-44308

Vulnerability from fkie_nvd - Published: 2026-05-14 15:16 - Updated: 2026-05-14 18:19

Severity

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

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-44308",
  "lastModified": "2026-05-14T18:19:25.260",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
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          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
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          "version": "4.0",
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          "vulnConfidentialityImpact": "LOW",
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    }
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    }
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}

GHSA-R4W4-WV68-QV85

Vulnerability from github – Published: 2026-05-07 00:06 – Updated: 2026-05-14 20:49

Summary

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

Details

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

Severity

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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.awspring.cloud:spring-cloud-aws-sns"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.awspring.cloud:spring-cloud-aws-sns"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "last_affected": "3.4.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44308"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T00:06:52Z",
    "nvd_published_at": "2026-05-14T15:16:47Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n  \n  Applications using Spring Cloud AWS SNS HTTP/HTTPS endpoint support (@NotificationMessageMapping, @NotificationSubscriptionMapping, @NotificationUnsubscribeConfirmationMapping) did not verify the signature of incoming SNS messages.\n\nAn unauthenticated attacker who knows the endpoint URL could send crafted HTTP POST requests mimicking SNS Notification or SubscriptionConfirmation messages, causing the application to:\n  \n  - Process arbitrary payloads as if they were legitimate SNS notifications.\n  - Auto-confirm subscriptions or unsubscribe from attacker-controlled topics.\n  \nAffected versions: 3.0.0 through 3.4.2, 4.0.0, and 4.0.1.\n  \nThe 3.x line will not receive a fix; users on 3.x should apply the workaround below or upgrade to 4.0.2.\n  \n### Patches\n  \nFixed 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.\n  \n### Workarounds\n  \nManually 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.\n  \n ### Resources\n  \n  - AWS SNS: Verifying the signatures of Amazon SNS messages (https://docs.aws.amazon.com/sns/latest/dg/sns-verify-signature-of-message.html)\n  - AWS SDK for Java v2: SnsMessageManager (https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/messagemanager/sns/SnsMessageManager.html)\n  - Fix PR: #1614",
  "id": "GHSA-r4w4-wv68-qv85",
  "modified": "2026-05-14T20:49:39Z",
  "published": "2026-05-07T00:06:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/awspring/spring-cloud-aws/security/advisories/GHSA-r4w4-wv68-qv85"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44308"
    },
    {
      "type": "WEB",
      "url": "https://github.com/awspring/spring-cloud-aws/pull/1614"
    },
    {
      "type": "WEB",
      "url": "https://github.com/awspring/spring-cloud-aws/commit/6ab2efd97891a3d0ed0126ffa1ce223c9cfa9638"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/awspring/spring-cloud-aws"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Spring Cloud AWS missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-44308 (GCVE-0-2026-44308)

FKIE_CVE-2026-44308

GHSA-R4W4-WV68-QV85

Impact

Patches

Workarounds

Tags

Sightings

Nomenclature