JumpServer Improper Certificate Validation in Custom SMS API Client

{
  "id": "ad66295dfed42b0ba71c501628f645ef88335f599961c5623d8030cda4fdd742",
  "url": "https://osv.dev/vulnerability/CVE-2026-31798",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "JumpServer Improper Certificate Validation in Custom SMS API Client",
    "summary": "JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to v4.10.16-lts, JumpServer improperly validates certificates in the Custom SMS API Client. When JumpServer sends MFA/OTP codes via Custom SMS API, an attacker can intercept the request and capture the verification code BEFORE it reaches the user's phone. This vulnerability is fixed in v4.10.16-lts.",
    "evidence": "osv:CVE-2026-31798",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-31798",
      "aliases": [
        "CVE-2026-31798",
        "GHSA-26pj-mmxw-w3w7"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jumpserver/jumpserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ded38791c2c5513a388ea0ba0a62858b4f5bd118"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.10.16-lts"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.10.16"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.10.15",
            "v4.10.14",
            "v4.10.13",
            "v4.10.10",
            "v4.10.9",
            "v4.10.8",
            "v4.10.4",
            "v4.10.2",
            "v4.9.0",
            "v4.7.0",
            "v4.6.0",
            "v2.27.0",
            "v2.26.0",
            "v2.25.0",
            "v2.24.0",
            "v2.23.0",
            "v2.22.0",
            "v2.21.0",
            "v2.20.0",
            "v2.19.0",
            "v2.18.1",
            "v2.18.0",
            "v2.17.0",
            "v2.15.1",
            "v2.15.0",
            "v2.13.0",
            "v2.12.0",
            "v2.11.0",
            "v2.10.0",
            "v2.9.0",
            "v2.8.0",
            "v2.7.0",
            "v2.6.0",
            "v2.5.0",
            "v2.4.0",
            "v2.3.1",
            "v2.3.0",
            "v2.2.1",
            "v2.2.0",
            "v2.1.0",
            "1.5.9",
            "1.5.8",
            "1.5.7",
            "1.5.6",
            "1.5.5",
            "1.5.4",
            "1.5.3",
            "1.5.2",
            "1.5.1",
            "1.5.0",
            "v1.4.10",
            "1.4.10",
            "1.4.9",
            "1.4.8",
            "1.4.7",
            "v1.4.7",
            "1.4.6",
            "1.4.5",
            "1.4.4",
            "v1.4.4",
            "1.4.3",
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.3",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.1",
            "1.2.0",
            "1.1.1",
            "1.1.0",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31798.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.651765282Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31798.json",
        "https://github.com/jumpserver/jumpserver/security/advisories/GHSA-26pj-mmxw-w3w7",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-31798"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-295"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31798.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-31798",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504761,
  "published_at": "2026-03-13T19:15:26.081+00:00"
}