Security advisory

{
  "id": "3f114df15124ddcf8c0dc785e037eeb8a47ac8e0daddc4a6eda4c3b4ce9a44ca",
  "url": "https://osv.dev/vulnerability/CVE-2020-8897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8897",
    "summary": "A weak robustness vulnerability exists in the AWS Encryption SDKs for Java, Python, C and Javalcript prior to versions 2.0.0. Due to the non-committing property of AES-GCM (and other AEAD ciphers such as AES-GCM-SIV or (X)ChaCha20Poly1305) used by the SDKs to encrypt messages, an attacker can craft a unique cyphertext which will decrypt to multiple different results, and becomes especially relevant in a multi-recipient setting. We recommend users update their SDK to 2.0.0 or later.",
    "evidence": "osv:CVE-2020-8897",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-8897",
      "aliases": [
        "CVE-2020-8897",
        "GHSA-wqgp-vphw-hphf",
        "PYSEC-2020-261"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/aws/aws-encryption-sdk-java",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b54780f0c1faac6c9e0a27880e12b0d2623bae67"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:amazon:aws_encryption_sdk:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.7.0",
            "1.6.2",
            "1.6.1",
            "1.6.0",
            "1.5.0",
            "1.4.1",
            "1.4.0",
            "1.3.6",
            "1.3.3",
            "1.3.0",
            "0.0.1",
            "0.0.1-SNAPSHOT"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8897.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.380177104Z",
      "provider": "osv",
      "references": [
        "https://aws.amazon.com/blogs/security/improved-client-side-encryption-explicit-keyids-and-key-commitment/",
        "https://github.com/google/security-research/security/advisories/GHSA-wqgp-vphw-hphf"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8897",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431347,
  "published_at": "2020-11-16T12:15:14.557+00:00"
}