{"id":78966,"date":"2026-05-28T13:46:39","date_gmt":"2026-05-28T10:16:39","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-47074-ex_aws_sns-signingcerturl-not-validated-in-verify_message-1\/"},"modified":"2026-05-28T13:46:39","modified_gmt":"2026-05-28T10:16:39","slug":"cve-2026-47074-ex_aws_sns-signingcerturl-not-validated-in-verify_message-1","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-47074-ex_aws_sns-signingcerturl-not-validated-in-verify_message-1\/","title":{"rendered":"CVE-2026-47074 &#8211; ex_aws_sns SigningCertURL not validated in verify_message\/1"},"content":{"rendered":"<p>CVE ID :CVE-2026-47074<\/p>\n<p>  Published : May 28, 2026, 10:16 a.m. | 15\u00a0minutes ago<\/p>\n<p>  Description :Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (ExAws.SNS, ExAws.SNS.PublicKeyCache modules) allows Signature Spoofing by Improper Validation.<\/p>\n<p>This vulnerability is associated with program files lib\/ex_aws\/sns.ex, lib\/ex_aws\/sns\/public_key_cache.ex and program routines &#8216;Elixir.ExAws.SNS&#8217;:verify_message\/1, &#8216;Elixir.ExAws.SNS.PublicKeyCache&#8217;:get\/1.<\/p>\n<p>&#8216;Elixir.ExAws.SNS&#8217;: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.<\/p>\n<p>This issue affects ex_aws_sns: from 2.0.1 before 2.3.5.<\/p>\n<p>  Severity: 8.7 | HIGH<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-47074 Published : May 28, 2026, 10:16 a.m. | 15\u00a0minutes ago Description :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 &#8216;Elixir.ExAws.SNS&#8217;:verify_message\/1, &#8216;Elixir.ExAws.SNS.PublicKeyCache&#8217;:get\/1. &#8216;Elixir.ExAws.SNS&#8217;:verify_message\/1 fetches the signing certificate from the SigningCertURL field of the &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-78966","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=78966"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78966\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}