synced 14 MIN AGO
01 Record

CVE-2026-115413

AWS API MCP Server OAuth Token Audience Validation Bypass

HighPUBLISHEDCNA: AMZN
CNA base score7.3 CVSS v4.0CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

02 Description

AWS API MCP Server OAuth Token Audience Validation Bypass

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.09% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 0.7% of scored records. A rank, not a probability.
NVD base score
7.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-28.
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
2026-10-27 18:10Z1 DAY AGO
Last updated
2026-10-27 18:10Z1 DAY AGO
Reserved
2026-10-22
Assigning CNA
AMZN
Record state
PUBLISHED
Severity
High (CVSS 7.3)
CNA CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weaknesses
  • CWE-346Origin Validation ErrorClass
Data version
5.2
Document digest
0ee0822bc14e0c4e713ce6796d10d94f217a194c5e14722d91551f3045d2b401

05 Affected products

VendorProductVersionsPlatforms
AWSaws-api-mcp-server1.3.0 to < 1.6.0—

06 References