FKIE_CVE-2026-32600

Vulnerability from fkie_nvd - Published: 2026-03-16 14:19 - Updated: 2026-06-17 10:36
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Summary
xml-security is a library that implements XML signatures and encryption. Prior to versions 2.3.1 and 1.13.9, XML nodes encrypted with either aes-128-gcm, aes-192-gcm, or aes-256-gcm lack validation of the authentication tag length. An attacker can use this to brute-force an authentication tag, recover the GHASH key, and decrypt the encrypted nodes. It also allows to forge arbitrary ciphertexts without knowing the encryption key. This vulnerability is fixed in 2.3.1 and 1.13.9.
References
security-advisories@github.comhttps://github.com/simplesamlphp/xml-security/commit/cad6d57cf0a5a0b7e0cc4e4a5b18752e56eb1520Patch
security-advisories@github.comhttps://github.com/simplesamlphp/xml-security/commit/fdc12449e959c610943f9fd428e95e3832d74c25Patch
security-advisories@github.comhttps://github.com/simplesamlphp/xml-security/security/advisories/GHSA-r353-4845-pr5pExploit, Vendor Advisory
Impacted products
Vendor Product Version
simplesamlphp xml-security *
simplesamlphp xml-security *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "xml-security",
          "vendor": "simplesamlphp",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.3.1"
            },
            {
              "status": "affected",
              "version": "\u003c 1.13.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:simplesamlphp:xml-security:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3D4DF512-B74E-412C-804F-6ED06CC1B9F1",
              "versionEndExcluding": "1.13.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:simplesamlphp:xml-security:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "78834E45-06AC-48A5-9535-C6A34F4FEF96",
              "versionEndExcluding": "2.3.1",
              "versionStartIncluding": "2.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "xml-security is a library that implements XML signatures and encryption. Prior to versions 2.3.1 and 1.13.9, XML nodes encrypted with either aes-128-gcm, aes-192-gcm, or aes-256-gcm lack validation of the authentication tag length. An attacker can use this to brute-force an authentication tag, recover the GHASH key, and decrypt the encrypted nodes. It also allows to forge arbitrary ciphertexts without knowing the encryption key. This vulnerability is fixed in 2.3.1 and 1.13.9."
    },
    {
      "lang": "es",
      "value": "xml-security es una biblioteca que implementa firmas XML y cifrado. Antes de las versiones 2.3.1 y 1.13.9, los nodos XML cifrados con aes-128-gcm, aes-192-gcm o aes-256-gcm carecen de validaci\u00f3n de la longitud de la etiqueta de autenticaci\u00f3n. Un atacante puede usar esto para forzar por fuerza bruta una etiqueta de autenticaci\u00f3n, recuperar la clave GHASH y descifrar los nodos cifrados. Tambi\u00e9n permite falsificar textos cifrados arbitrarios sin conocer la clave de cifrado. Esta vulnerabilidad est\u00e1 corregida en 2.3.1 y 1.13.9."
    }
  ],
  "id": "CVE-2026-32600",
  "lastModified": "2026-06-17T10:36:04.703",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-32600",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-16T14:01:30.383537Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-16T14:19:38.953",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/simplesamlphp/xml-security/commit/cad6d57cf0a5a0b7e0cc4e4a5b18752e56eb1520"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/simplesamlphp/xml-security/commit/fdc12449e959c610943f9fd428e95e3832d74c25"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-r353-4845-pr5p"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-354"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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