{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:trustedfirmware:mbed_tls:4.0.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "3.3.0"
              },
              {
                "fixed": "3.6.6"
              },
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.0.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "8c89224991adff88d53cd380f42a2baa36f91454"
            },
            {
              "fixed": "0bebf8b8c7f07abe3571ded48a11aa907a1ffb20"
            },
            {
              "introduced": "ec4044008d2d069da38288bc76b0fee34ec78646"
            },
            {
              "last_affected": "ec4044008d2d069da38288bc76b0fee34ec78646"
            }
          ],
          "repo": "https://github.com/mbed-tls/mbedtls",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.0.0"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25834.json"
  },
  "details": "Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.",
  "id": "CVE-2026-25834",
  "modified": "2026-07-15T01:48:51.176556441Z",
  "published": "2026-04-01T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25834.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mbed-tls.readthedocs.io/en/latest/security-advisories/"
    },
    {
      "type": "ADVISORY",
      "url": "https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-sigalg-injection/"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25834"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}