CVE-2026-47074

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Source
https://cve.org/CVERecord?id=CVE-2026-47074
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47074.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-47074
Aliases
Published
2026-05-28T09:05:54Z
Modified
2026-10-08T02:50:59Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
ex_aws_sns SigningCertURL not validated in verify_message/1
Details

Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (ExAws.SNS, ExAws.SNS.PublicKeyCache modules) allows Signature Spoofing by Improper Validation.

This 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.

'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.

This issue affects ex_aws_sns: from 2.0.1 before 2.3.5.

Database specific 
{
    "cna_assigner":  "EEF",
    "cwe_ids":  [
        "CWE-295"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47074.json"
}
References

Affected packages

Git / github.com/ex-aws/ex_aws_sns

Affected ranges

Type
GIT
Repo
https://github.com/ex-aws/ex_aws_sns
Events
Introduced
a7ec21880943f4dac1d59bda557db0ffcd2b61fa
Fixed
1853d280b152d10384a1e21a22cf22152a60be48
Introduced
775d31ffb1e78702d78275ad8841be132d678b50
Fixed
97626db164a68b60c87f03fd3238551076b8a9ac
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "2.0.1"
        },
        {
            "fixed":  "2.3.5"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v2.*
v2.0.1
v2.2.0
v2.3.0
v2.3.1
v2.3.2
v2.3.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47074.json"