CVE-2026-53961
🔶 mediumSummary
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.
CVSS Score
6.5
Medium
EPSS Score
0.2
Exploit Probability
Published Date
2026-07-09
First Seen: 2026-07-10
📊 Relative Risk Intelligence
This CVE is Lower Risk - more severe than 46.6% of all 360,673 vulnerabilities in our database.
#192,686
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jul 10, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by
CISA
Last Modified
2026-07-14
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CWE IDs (Weakness Types)