CVE-2026-53961

CVE-2026-53961 concerns Discourse, an open-source discussion platform. Prior to the fixed versions, the AWS SES bounce webhook at POST /webhooks/aws did not bind SNS-signed messages to trusted TopicArn values, enabling any AWS account holder to publish forged Bounce notifications that revoke a ta...

CVE-2026-53961 Discourse: Forged AWS SNS bounce notifications can disable a targeted user's email (missing TopicArn binding)

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the AWS SES bounce webhook at POST /webhooks/aws verified that SNS messages were signed by Amazon but did not bind them to trusted TopicArn values, allowing any AWS account holder to publish...