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CVE-2026-74871

Estado: AnalizadaMedia (6.9)—

openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Jahlives — Openssl Encrypt

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-74871",
  "cveTags": [],
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          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-08-17T17:35:23.785880Z"
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          "vulnIntegrityImpact": "NONE",
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          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
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          "vendor": "jahlives",
          "product": "openssl_encrypt",
          "versions": [
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              "version": "0",
              "lessThan": "1.4.6",
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              "version": "1.4.6",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:pypi/openssl_encrypt",
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  "published": "2026-08-17T11:16:41.427",
  "references": [
    {
      "url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
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    },
    {
      "url": "https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor",
      "tags": [
        "Third Party Advisory"
      ],
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  ],
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      "source": "disclosure@vulncheck.com",
      "description": [
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          "value": "CWE-916"
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  ],
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    }
  ],
  "lastModified": "2026-09-10T16:56:31.877",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}