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High

SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting

Type: advisorySources: OSV

SiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kernel port keeps serving full API access over plain HTTP alongside HTTPS. Network-adjacent attackers can sniff the cleartext login flow and session cookie, which lacks the Secure attribute while responses omit HSTS, to hijack kernel API sessions.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-116166
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 16:53 UTC · Revision 1

Source evidence

SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting

core-osv · Original source

Published 25 Oct 2026, 13:20 UTC

SiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kernel port keeps serving full API access over plain HTTP alongside HTTPS. Network-adjacent attackers can sniff the cleartext login flow and session cookie, which lacks the Secure attribute while responses omit HSTS, to hijack kernel API sessions.

osv:CVE-2026-116166
Complete source record
{
  "id": "c3017a68dd8ff395edb116673bbba77c3480919b561a4f8465e9f9b8527e1387",
  "url": "https://osv.dev/vulnerability/CVE-2026-116166",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SiYuan 3.6.0 before 3.8.7 Cleartext Transmission via Unenforced networkServeTLS Setting",
    "summary": "SiYuan 3.6.0 before 3.8.7 accepts and persists the networkServeTLS setting but never enforces it, so the kernel port keeps serving full API access over plain HTTP alongside HTTPS. Network-adjacent attackers can sniff the cleartext login flow and session cookie, which lacks the Secure attribute while responses omit HSTS, to hijack kernel API sessions.",
    "evidence": "osv:CVE-2026-116166",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-116166",
      "aliases": [
        "CVE-2026-116166",
        "GHSA-hpj5-f7cj-vvwr"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/siyuan-note/siyuan",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fd6526133bb318d534b8865998f8059ae765fdd1"
                },
                {
                  "fixed": "7a7430d8a3cf362e23de004a454ddabe651dc778"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.6.0"
                      },
                      {
                        "fixed": "3.8.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3.6.0"
                      },
                      {
                        "fixed": "3.8.7"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.8.6",
            "v3.8.6-beta.2",
            "v3.8.6-beta.1",
            "v3.8.6-alpha.10",
            "v3.8.6-alpha.9",
            "v3.8.6-alpha.8",
            "v3.8.6-alpha.7",
            "v3.8.6-alpha.4",
            "v3.8.6-alpha.3",
            "v3.8.6-alpha.2",
            "v3.8.6-alpha.1",
            "v3.8.5",
            "v3.8.5-beta.5",
            "v3.8.5-beta.3",
            "v3.8.5-beta.2",
            "v3.8.5-beta.1",
            "v3.8.5-alpha.5",
            "v3.8.5-alpha.3",
            "v3.8.4",
            "v3.8.4-beta.5",
            "v3.8.4-beta.4",
            "v3.8.4-beta.3",
            "v3.8.3",
            "v3.8.4-beta.2",
            "v3.8.4-beta.1",
            "v3.8.3-beta.1",
            "v3.8.3-alpha.3",
            "v3.8.3-alpha.2",
            "v3.8.3-alpha.1",
            "v3.8.2-alpha.6",
            "v3.8.2-alpha.5",
            "v3.8.2-alpha.4",
            "v3.8.2-alpha.3",
            "v3.8.2-alpha.1",
            "v3.8.1",
            "v3.8.1-beta.6",
            "v3.8.1-beta.5",
            "v3.8.1-beta.4",
            "v3.8.1-beta.1",
            "v3.8.0",
            "v3.8.0-beta.2",
            "v3.8.0-alpha.4",
            "v3.8.0-alpha.3",
            "v3.8.0-alpha.2",
            "v3.7.4-alpha.4",
            "v3.7.4-alpha.2",
            "v3.7.3",
            "v3.7.3-beta.2",
            "v3.7.3-beta.1",
            "v3.7.0-rc.2",
            "v3.7.0-rc.1",
            "v3.6.5",
            "v3.7.0-dev12",
            "v3.7.0-dev8",
            "v3.7.0-dev5",
            "v3.7.0-dev2",
            "v3.6.5-dev2",
            "v3.6.4",
            "v3.6.4-dev2",
            "v3.6.3",
            "v3.6.2",
            "v3.6.1",
            "v3.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-116166.json"
          }
        }
      ],
      "modified": "2026-10-31T02:30:23.191442764Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116166.json",
        "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hpj5-f7cj-vvwr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-116166",
        "https://www.vulncheck.com/advisories/siyuan-3.6.0-before-3.8.7-cleartext-transmission-via-unenforced-networkservetls-setting"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-319"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116166.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116166",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519924,
  "published_at": "2026-10-25T13:20:09.7+00:00"
}