CVE-2026-3337

HIGH EPSS 60.9%
Published Mar 2, 20264mo ago · Modified Jun 17, 20262w ago
8.2 CVSS 4.0
High
Find Similar
Published Mar 2, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/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
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
60.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-208

Affected Products 4

VendorProductVersionRange
amazonaws-lc-fips-sys*≥0.13.0  –  <0.13.12
amazonaws-lc-sys*≥0.14.0  –  <0.38.0
amazonaws_libcrypto*≥1.21.0  –  <1.69.0
amazonaws_libcrypto*≥3.0.0  –  <3.2.0

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.