{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-47074",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-05-18T17:28:08.322Z",
        "datePublished": "2026-05-28T09:05:54.815Z",
        "dateUpdated": "2026-05-29T04:40:43.232Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ex_aws_sns_project:ex_aws_sns:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.ExAws.SNS'",
                        "'Elixir.ExAws.SNS.PublicKeyCache'"
                    ],
                    "packageName": "ex_aws_sns",
                    "packageURL": "pkg:hex/ex_aws_sns",
                    "product": "ex_aws_sns",
                    "programFiles": [
                        "lib/ex_aws/sns.ex",
                        "lib/ex_aws/sns/public_key_cache.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.ExAws.SNS':verify_message/1"
                        },
                        {
                            "name": "'Elixir.ExAws.SNS.PublicKeyCache':get/1"
                        }
                    ],
                    "repo": "https://github.com/ex-aws/ex_aws_sns",
                    "vendor": "ex-aws",
                    "versions": [
                        {
                            "lessThan": "2.3.5",
                            "status": "affected",
                            "version": "2.0.1",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ex_aws_sns_project:ex_aws_sns:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.ExAws.SNS'",
                        "'Elixir.ExAws.SNS.PublicKeyCache'"
                    ],
                    "packageName": "ex-aws/ex_aws_sns",
                    "packageURL": "pkg:github/ex-aws/ex_aws_sns",
                    "product": "ex_aws_sns",
                    "programFiles": [
                        "lib/ex_aws/sns.ex",
                        "lib/ex_aws/sns/public_key_cache.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.ExAws.SNS':verify_message/1"
                        },
                        {
                            "name": "'Elixir.ExAws.SNS.PublicKeyCache':get/1"
                        }
                    ],
                    "repo": "https://github.com/ex-aws/ex_aws_sns",
                    "vendor": "ex-aws",
                    "versions": [
                        {
                            "lessThan": "1853d280b152d10384a1e21a22cf22152a60be48",
                            "status": "affected",
                            "version": "a7ec21880943f4dac1d59bda557db0ffcd2b61fa",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The application must expose an HTTP endpoint that calls <tt>'Elixir.ExAws.SNS':verify_message/1</tt> on incoming request bodies.</p>"
                        }
                    ],
                    "value": "The application must expose an HTTP endpoint that calls 'Elixir.ExAws.SNS':verify_message/1 on incoming request bodies."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ex_aws_sns_project:ex_aws_sns:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "2.3.5",
                                    "versionStartIncluding": "2.0.1",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "AND"
                        }
                    ],
                    "operator": "OR"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Bernard Duggan"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Jonatan Männchen / EEF"
                },
                {
                    "lang": "en",
                    "type": "analyst",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (<tt>ExAws.SNS</tt>, <tt>ExAws.SNS.PublicKeyCache</tt> modules) allows Signature Spoofing by Improper Validation.<p>This vulnerability is associated with program files <tt>lib/ex_aws/sns.ex</tt>, <tt>lib/ex_aws/sns/public_key_cache.ex</tt> and program routines <tt>'Elixir.ExAws.SNS':verify_message/1</tt>, <tt>'Elixir.ExAws.SNS.PublicKeyCache':get/1</tt>.</p><p><tt>'Elixir.ExAws.SNS':verify_message/1</tt> fetches the signing certificate from the <tt>SigningCertURL</tt> field of the incoming SNS message without validating that the URL uses HTTPS or that the host matches an AWS-owned SNS certificate domain. An unauthenticated attacker who can POST to an endpoint that calls <tt>verify_message/1</tt> can supply an attacker-controlled <tt>SigningCertURL</tt>, sign a forged SNS message with their own key, and cause the function to return <tt>:ok</tt>, completely bypassing SNS signature verification.</p><p>This issue affects ex_aws_sns: from 2.0.1 before 2.3.5.</p>"
                        }
                    ],
                    "value": "Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (ExAws.SNS, ExAws.SNS.PublicKeyCache modules) allows Signature Spoofing by Improper Validation.\n\nThis vulnerability is associated with program files lib/ex_aws/sns.ex, lib/ex_aws/sns/public_key_cache.ex and program routines 'Elixir.ExAws.SNS':verify_message/1, 'Elixir.ExAws.SNS.PublicKeyCache':get/1.\n\n'Elixir.ExAws.SNS':verify_message/1 fetches the signing certificate from the SigningCertURL field of the incoming SNS message without validating that the URL uses HTTPS or that the host matches an AWS-owned SNS certificate domain. An unauthenticated attacker who can POST to an endpoint that calls verify_message/1 can supply an attacker-controlled SigningCertURL, sign a forged SNS message with their own key, and cause the function to return :ok, completely bypassing SNS signature verification.\n\nThis issue affects ex_aws_sns: from 2.0.1 before 2.3.5."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-473",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-473 Signature Spoofing by Improper Validation"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "privilegesRequired": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-295",
                            "description": "CWE-295 Improper Certificate Validation",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-05-29T04:40:43.232Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ex-aws/ex_aws_sns/security/advisories/GHSA-8jgf-23q5-x7xx"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-47074.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-47074"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ex-aws/ex_aws_sns/commit/1853d280b152d10384a1e21a22cf22152a60be48"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "ex_aws_sns SigningCertURL not validated in verify_message/1",
            "x_generator": {
                "engine": "cvelib 1.8.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-28T10:29:45.193313Z",
                                "id": "CVE-2026-47074",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-28T10:31:15.111Z"
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}