CVE-2026-119148

Unvalidated parent-supplied AWS Region in AWS aws-nitro-enclaves-sdk-c allows impersonation of the enclave's AWS KMS endpoint

State: Published
Severity: 8.2 High
Published: Oct 30, 2026
Updated: Oct 30, 2026
Reserved: Oct 29, 2026

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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.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N	AMZN
3.1	6.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N	AMZN

Weaknesses

CWE-807 Reliance on untrusted inputs in a security decision

Affected Products

Product	Versions
aws-nitro-enclaves-sdk-cAWS	before 0.4.6Affected

References

https://github.com/aws/aws-nitro-enclaves-sdk-c/releases/tag/v0.4.6release-notespatch
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-r57jthird-party-advisory

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