CVE-2026-3337

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:amazon:aws-lc-fips-sys::::::rust::*
	cpe:2.3:a:amazon:aws-lc-sys::::::rust::*
	cpe:2.3:a:amazon:aws_libcrypto::::::::
	cpe:2.3:a:amazon:aws_libcrypto:::::fips:::*

History

No history.

Information

Published : 2026-03-02 22:16

Updated : 2026-03-11 17:14

NVD link : CVE-2026-3337

Mitre link : CVE-2026-3337

CVE.ORG link : CVE-2026-3337

JSON object : View

Products Affected

amazon

aws_libcrypto
aws-lc-fips-sys
aws-lc-sys

CWE

CWE-208

Observable Timing Discrepancy

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