CVE-2026-53961
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.
- Affected products
- Discourse
- Discourse
- < 2026.1.5, 2026.4.2, 2026.5.1, 2026.6.0
- Fix
- Available
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.2% (14th percentile)
- Weakness
- CWE-345
- NVD status
- Analyzed
- Published
- 2026-07-09
CVE-2026-53961 at NVD
No indexed exploits for CVE-2026-53961 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-53961 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.