{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-31790",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T14:32:04.700201Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-08T14:32:37.439Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC CN 4100",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V5.0",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T12:09:06.208Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "3.6.2",
              "status": "affected",
              "version": "3.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.6",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.4.5",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.3.7",
              "status": "affected",
              "version": "3.3.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.20",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Simo Sorce (Red Hat)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Nikola Pajkovsky"
        }
      ],
      "datePublic": "2026-04-07T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Issue summary: Applications using RSASVE key encapsulation to establish\u003cbr\u003ea secret encryption key can send contents of an uninitialized memory buffer to\u003cbr\u003ea malicious peer.\u003cbr\u003e\u003cbr\u003eImpact summary: The uninitialized buffer might contain sensitive data from the\u003cbr\u003eprevious execution of the application process which leads to sensitive data\u003cbr\u003eleakage to an attacker.\u003cbr\u003e\u003cbr\u003eRSA_public_encrypt() returns the number of bytes written on success and -1\u003cbr\u003eon error. The affected code tests only whether the return value is non-zero.\u003cbr\u003eAs a result, if RSA encryption fails, encapsulation can still return success to\u003cbr\u003ethe caller, set the output lengths, and leave the caller to use the contents of\u003cbr\u003ethe ciphertext buffer as if a valid KEM ciphertext had been produced.\u003cbr\u003e\u003cbr\u003eIf applications use EVP_PKEY_encapsulate() with RSA/RSASVE on an\u003cbr\u003eattacker-supplied invalid RSA public key without first validating that key,\u003cbr\u003ethen this may cause stale or uninitialized contents of the caller-provided\u003cbr\u003eciphertext buffer to be disclosed to the attacker in place of the KEM\u003cbr\u003eciphertext.\u003cbr\u003e\u003cbr\u003eAs a workaround calling EVP_PKEY_public_check() or\u003cbr\u003eEVP_PKEY_public_check_quick() before EVP_PKEY_encapsulate() will mitigate\u003cbr\u003ethe issue.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are affected by this issue."
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          ],
          "value": "Issue summary: Applications using RSASVE key encapsulation to establish\na secret encryption key can send contents of an uninitialized memory buffer to\na malicious peer.\n\nImpact summary: The uninitialized buffer might contain sensitive data from the\nprevious execution of the application process which leads to sensitive data\nleakage to an attacker.\n\nRSA_public_encrypt() returns the number of bytes written on success and -1\non error. The affected code tests only whether the return value is non-zero.\nAs a result, if RSA encryption fails, encapsulation can still return success to\nthe caller, set the output lengths, and leave the caller to use the contents of\nthe ciphertext buffer as if a valid KEM ciphertext had been produced.\n\nIf applications use EVP_PKEY_encapsulate() with RSA/RSASVE on an\nattacker-supplied invalid RSA public key without first validating that key,\nthen this may cause stale or uninitialized contents of the caller-provided\nciphertext buffer to be disclosed to the attacker in place of the KEM\nciphertext.\n\nAs a workaround calling EVP_PKEY_public_check() or\nEVP_PKEY_public_check_quick() before EVP_PKEY_encapsulate() will mitigate\nthe issue.\n\nThe FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are affected by this issue."
        }
      ],
      "metrics": [
        {
          "format": "other",
          "other": {
            "content": {
              "text": "Moderate"
            },
            "type": "https://openssl-library.org/policies/general/security-policy/"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-754",
              "description": "CWE-754 Improper Check for Unusual or Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-07T22:00:56.698Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
      },
      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://openssl-library.org/news/secadv/20260407.txt"
        },
        {
          "name": "3.6.2 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/abd8b2eec7e3f3fda60ecfb68498b246b52af482"
        },
        {
          "name": "3.5.6 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/001e01db3e996e13ffc72386fe79d03a6683b5ac"
        },
        {
          "name": "3.4.5 git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/d5f8e71cd0a54e961d0c3b174348f8308486f790"
        },
        {
          "name": "3.3.7 git commit",
          "tags": [
            "patch"
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          "url": "https://github.com/openssl/openssl/commit/b922e24e5b23ffb9cb9e14cadff23d91e9f7e406"
        },
        {
          "name": "3.0.20 git commit",
          "tags": [
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          "url": "https://github.com/openssl/openssl/commit/eed200f58cd8645ed77e46b7e9f764e284df379e"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Incorrect Failure Handling in RSA KEM RSASVE Encapsulation",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
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  "cveMetadata": {
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    "assignerShortName": "openssl",
    "cveId": "CVE-2026-31790",
    "datePublished": "2026-04-07T22:00:56.698Z",
    "dateReserved": "2026-03-09T15:56:53.191Z",
    "dateUpdated": "2026-05-12T12:09:06.208Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}