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01 Record

CVE-2026-53961

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

MediumPUBLISHEDCNA: GitHub_M
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.30% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 22.4% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD analysis status
Analyzed. NVD last modified this record on 2026-07-14.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-09 21:48Z3 MO AGO
Last updated
2026-07-10 13:44Z3 MO AGO
Reserved
2026-06-11
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weaknesses
  • CWE-345Insufficient Verification of Data AuthenticityClass
Data version
5.2
Document digest
2876255e0435376e7bcca8f9cbcd8258344a6513c3eaabe3fd5b07d98a3a4b83

05 Affected products

VendorProductVersionsPlatforms
discoursediscourse>= 2026.5.0-latest, < 2026.5.1, >= 2026.4.0-latest, < 2026.4.2, >= 2026.1.0-latest, < 2026.1.5—

06 References