obsidian-tc: Memory-lifecycle tools overwrite unowned notes or partially commit lifecycle changes

{
  "id": "7947a05d957666c246d6da00c135b1dadf81410f32d8275e81ef8b85fa1518a6",
  "url": "https://osv.dev/vulnerability/GHSA-r3g7-r4hr-m258",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "obsidian-tc: Memory-lifecycle tools overwrite unowned notes or partially commit lifecycle changes",
    "summary": "### Summary `create_entity`, `link_entities`, `rename_entity`, `unlink_entities` and `delete_entity` regenerate a memory note's body from SQLite at the computed `memory//.md` path. When a note already existed at that path and was not owned by the entity being written (a hand-authored note, or an orphan left by a different entity whose name sanitized to the same path), its entire body was overwritten on the next write naming that `(type, name)`, keeping only its frontmatter. Separately, several of these tools inserted or removed their SQLite row before the fallible filesystem step, so a refused note write could leave a relation gone, a retired status committed, or the wrong entity deleted. ### Details - `create_entity` and `link_entities` inserted the SQL row or relation before materialization. - `rename_entity` seeded the destination path with a direct atomic write that bypassed the ownership check, and for a status-only rename could commit a retired status with the note write refused. - `unlink_entities` removed the relation row before discovering the source note's rematerialization would be refused. - `delete_entity`'s cascade could delete the target and its relations before a neighbour's note was found to be foreign. The overwrite exists in every released version since `materializeEntity` shipped (`git show v1.0.1:packages/server/src/memory/materialize.ts`). ### Impact An authorized caller with memory-write scope (any agent using the M5 memory tools) can, without intending",
    "evidence": "osv:GHSA-r3g7-r4hr-m258",
    "products": [
      {
        "name": {
          "value": "obsidian-tc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.31.4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-r3g7-r4hr-m258",
      "aliases": [
        "CVE-2026-115478",
        "GHSA-r3g7-r4hr-m258"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "1.0.1"
                },
                {
                  "fixed": "1.31.4"
                }
              ]
            }
          ],
          "package": {
            "name": "obsidian-tc",
            "purl": "pkg:npm/obsidian-tc",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-r3g7-r4hr-m258/GHSA-r3g7-r4hr-m258.json",
            "last_known_affected_version_range": "<= 1.31.3"
          }
        }
      ],
      "modified": "2026-10-23T19:00:40.500298795Z",
      "provider": "osv",
      "references": [
        "https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-r3g7-r4hr-m258",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115478",
        "https://github.com/The-40-Thieves/obsidian-tc/pull/978",
        "https://github.com/The-40-Thieves/obsidian-tc/commit/99f7914ca0fbeed92e7c4d39cc8c3e5830dab133",
        "https://github.com/The-40-Thieves/obsidian-tc",
        "https://github.com/The-40-Thieves/obsidian-tc/blob/v1.31.4/CHANGELOG.md",
        "https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.31.4"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-459",
          "CWE-863"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-23T15:17:30Z",
        "github_reviewed_at": "2026-10-23T18:47:25Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115478",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 424613,
  "published_at": "2026-10-23T18:47:25+00:00"
}