CVE-2026-3337 (GCVE-0-2026-3337)

Vulnerability from cvelistv5 – Published: 2026-03-02 21:20 – Updated: 2026-03-03 20:04
VLAI
Title
Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
Summary
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.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
8.2 (High)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-03 20:03 UTC
CWE
  • CWE-208 - (Observable Timing Discrepancy)
Assigner
References
Impacted products
Vendor Product Version CPE status
AWS AWS-LC Affected: 1.21.0 , < 1.69.0 (custom)
guessed Create a notification for this product.
AWS AWS-LC-FIPS Affected: 3.0.0 , < 3.2.0 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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              "url": "https://github.com/aws/aws-lc/releases/tag/v1.69.0"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Timing Side-Channel in AES-CCM Tag Verification in AWS-LC",
          "x_generator": {
            "engine": "Vulnogram 0.5.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
        "assignerShortName": "AMZN",
        "cveId": "CVE-2026-3337",
        "datePublished": "2026-03-02T21:20:08.532Z",
        "dateReserved": "2026-02-27T15:16:28.371Z",
        "dateUpdated": "2026-03-03T20:04:27.577Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.