{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "nebula",
          "vendor": "slackhq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.7.0, \u003c 1.10.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. This issue has been patched in version 1.10.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T22:55:36.011Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/slackhq/nebula/security/advisories/GHSA-69x3-g4r3-p962",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/slackhq/nebula/security/advisories/GHSA-69x3-g4r3-p962"
        },
        {
          "name": "https://github.com/slackhq/nebula/commit/f573e8a26695278f9d71587390fbfe0d0933aa21",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/slackhq/nebula/commit/f573e8a26695278f9d71587390fbfe0d0933aa21"
        }
      ],
      "source": {
        "advisory": "GHSA-69x3-g4r3-p962",
        "discovery": "UNKNOWN"
      },
      "title": "Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-25793",
    "datePublished": "2026-02-06T22:55:36.011Z",
    "dateReserved": "2026-02-05T19:58:01.640Z",
    "dateUpdated": "2026-02-06T22:55:36.011Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}