CVE-2026-3337

MediumCVSS 5.9/10Last modified Jun 17, 2026

Description

Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.

The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.

Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-208

Affected software

Vendor	Product	Versions
AWS	AWS-LC	>= 1.21.0, < 1.69.0
AWS	AWS-LC-FIPS	>= 3.0.0, < 3.2.0

References

https://aws.amazon.com/security/security-bulletins/2026-005-AWS/Vendor Advisory
https://github.com/aws/aws-lc/releases/tag/v1.69.0Release Notes
https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxhVendor Advisory

Timeline

Published: Mar 2, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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