{"id":"CVE-2026-115478","aliases":[],"cve":{"records":[{"id":"CVE-2026-115478","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-22T15:06:52.738Z","published":"2026-10-23T14:06:28.128Z","modified":"2026-10-30T17:46:48.838Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-23T14:06:28.128Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T17:46:48.838Z"}],"references":[{"url":"https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-r3g7-r4hr-m258","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/pull/978","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/commit/99f7914ca0fbeed92e7c4d39cc8c3e5830dab133","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/blob/v1.31.4/CHANGELOG.md","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.31.4","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-459","description":"CWE-459: Incomplete Cleanup","source":"GitHub_M"},{"id":"CWE-863","description":"CWE-863: Incorrect Authorization","source":"GitHub_M"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T17:46:41.575435Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"obsidian-tc: Memory-lifecycle tools overwrite unowned notes or partially commit lifecycle changes","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.0.1 until 1.31.4, `create_entity`, `link_entities`, `rename_entity`, `unlink_entities` and `delete_entity` regenerate memory notes from SQLite at the computed `memory/<type>/<name>.md` path without reliably preserving note ownership or the consistency of a failed lifecycle operation. During shared materialization, a hand-authored note or an orphan left by a different entity whose name sanitized to the same path could have its entire body overwritten on the next write naming that type and name, with non-owned frontmatter preserved. `rename_entity` also seeded the destination path with a direct atomic write without validating ownership and could overwrite a foreign note there. Separately, several tools mutated SQLite before fallible filesystem work: `create_entity` and `link_entities` inserted the row or relation before materialization; `rename_entity` updated the entity, including a retired status, before updating its note; `unlink_entities` removed a relation before rematerializing the source note; and `delete_entity`'s cascade removed the target and its relations before rematerializing neighbouring notes. A later filesystem failure could therefore leave a row or relation changed and the memory graph inconsistent with the notes on disk even when the operation failed. An authorized caller with the required memory-tool permissions could, without intending to, destroy the body of a vault note outside the entity being written; `delete_entity` additionally requires its deletion permission and destructive confirmation, which this memory flaw does not bypass. Snapshots-before-write through `restore_note` mitigate the overwrite only where snapshots are enabled and the note had previously been written through obsidian-tc. This issue is fixed in version 1.31.4.","score":7.1,"severity":"high","published":"2026-10-23T14:06:28.128Z","modified":"2026-10-30T17:46:48.838Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"The-40-Thieves","name":"obsidian-tc","platforms":[],"versions":[{"version":">= 1.0.1, < 1.31.4","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-115478"}],"remediation":[],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-r3g7-r4hr-m258","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/blob/v1.31.4/CHANGELOG.md","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.31.4"],"sources":[{"name":"CVE","id":"CVE-2026-115478","modified":"2026-10-30T17:46:48.838Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-115478"}],"assessments":[{"source":"GitHub_M","vector":"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","score":7.1}],"sourceAffected":[],"observedAt":"2026-10-30T18:28:07.494Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:30:33.758Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T18:40:34.564Z","attemptedAt":"2026-10-30T18:40:34.564Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T18:40:34.598Z","attemptedAt":"2026-10-30T18:40:34.598Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T18:40:33.678Z","attemptedAt":"2026-10-30T18:40:33.678Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T18:40:34.495Z","attemptedAt":"2026-10-30T18:40:34.495Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-109083","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109083","modified":"Oct 23, 2026, 2:06:28 PM","score":7.1,"vector":"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","checkedAt":"2026-10-30T18:40:33.678Z"},{"source":"FIRST EPSS","id":"CVE-2026-115478","url":"https://www.first.org/epss/","probability":0.00323,"percentile":0.2539,"date":"2026-10-30","checkedAt":"2026-10-30T18:40:34.495Z"},{"source":"NVD","id":"CVE-2026-115478","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115478","modified":"2026-10-30T18:17:22.357","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-30T18:40:34.564Z"},{"source":"GitHub Advisory Database","id":"GHSA-r3g7-r4hr-m258","url":"https://github.com/advisories/GHSA-r3g7-r4hr-m258","modified":"2026-10-23T18:47:40Z","checkedAt":"2026-10-30T18:40:34.598Z"}],"aiSummary":{"text":"obsidian-tc versions 1.0.1 to 1.31.4 may overwrite unowned notes due to incomplete cleanup and incorrect authorization. An authorized caller with memory-tool permissions could unintentionally destroy a vault note's body. The issue is fixed in version 1.31.4.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T10:36:16.155Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-115478"}]}}