Vulnerability · Published Oct 30, 2026 · Assigned by AMZN
CVE-2026-119148Unvalidated parent-supplied AWS Region in AWS aws-nitro-enclaves-sdk-c allows impersonation of the enclave's AWS KMS endpoint
Medium 6.5
In plain English
A medium-severity security flaw in aws-nitro-enclaves-sdk-c from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 93.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Incomplete string validation in AWS aws-nitro-enclaves-sdk-c before 0.4.6 may allow a third party to impersonate the AWS KMS endpoint. To remediate this issue, users should rebuild any custom enclave image against aws-nitro-enclaves-sdk-c 0.4.6.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | aws-nitro-enclaves-sdk-c | 0 – before 0.4.6 |
Weakness: CWE-807 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
References
- https://github.com/aws/aws-nitro-enclaves-sdk-c/releases/tag/v0.4.6 release-notes, patch
- https://aws.amazon.com/security/security-bulletins/2026-157-aws/ vendor-advisory
- https://github.com/aws/aws-nitro-enclaves-sdk-c/security/advisories/GHSA-f6f6-6f88-r57j third-party-advisory