CVE-2026-53961 | CyberRota

CyberRota Analysis

AI-Generated

The vulnerability affects the AWS SES bounce webhook in Discourse prior to specific patched versions, allowing any AWS account holder to send forged Bounce notifications that can revoke a targeted user's email. This could lead to unauthorized access or disruption of user accounts. Organizations using Discourse should prioritize updating to the fixed versions to mitigate potential risks associated with this issue.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE

CVE-2026-53961

Severity

MEDIUM

CVSS

6.5

EPSS

0.23%

Original NVD Description

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 validly signed forged Bounce notifications that revoke a targeted user email. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-59828 MEDIUM CVE-2026-55424 MEDIUM CVE-2026-53963 HIGH CVE-2026-53962 MEDIUM CVE-2026-49256 HIGH CVE-2026-46413 MEDIUM