Open5GS 2.6.1 through 2.8.0 Out-of-Bounds Read via parse_scheme_output

{
  "id": "e884172ae1c7e3c1b5c9e637ec2bca42e64b7080af4d54348241217731ad7105",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116544",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Open5GS 2.6.1 through 2.8.0 Out-of-Bounds Read via parse_scheme_output",
    "summary": "Open5GS 2.6.1 through 2.8.0 contains an out-of-bounds read vulnerability in parse_scheme_output() in lib/sbi/conv.c during SUCI de-concealment due to incomplete length validation. Remote unauthenticated UEs or SBI peers can submit a crafted SUCI with a 42-byte scheme output to a UDM, triggering a heap over-read past the buffer.",
    "evidence": "cve:CVE-2026-116544",
    "products": [
      {
        "name": {
          "value": "open5gs",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-116544",
      "aliases": [
        "CVE-2026-116544"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 6.3,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW"
          }
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 3.7,
            "attackVector": "NETWORK",
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "NONE",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "LOW"
          }
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/open5gs/open5gs",
          "vendor": "open5gs",
          "product": "open5gs",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.1",
              "versionType": "semver",
              "lessThanOrEqual": "2.8.0"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T16:15:00.617Z",
      "provider": "cve",
      "references": [
        "https://github.com/open5gs/open5gs/security/advisories/GHSA-vp5f-rg8g-8p7j",
        "https://github.com/open5gs/open5gs/commit/fdddcd5e3359703f0a945b308e64494a18a534f1",
        "https://github.com/open5gs/open5gs/blob/v2.8.0/lib/sbi/conv.c#L39",
        "https://github.com/open5gs/open5gs",
        "https://www.vulncheck.com/advisories/open5gs-2.6.1-through-2.8.0-out-of-bounds-read-via-parse-scheme-output"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-116544",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T15:38:05.412866Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T16:15:00.617Z"
            }
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        "cna": {
          "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-26T14:59:42.931Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116544",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 318570,
  "published_at": "2026-10-26T14:59:42.931+00:00"
}