{"id":"CVE-2026-115477","revision":null,"records":[{"revision":"dc3350b9f0f34acf8fed61deca2f3ae7","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-115477","aliases":[],"title":"obsidian-tc: Declined human-in-the-loop confirmations can permit destructive calls over HTTP","description":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.13.0 until 1.31.4, on a Streamable HTTP deployment with `auth.jwtSecret` configured and a 2026-07-28-era client declaring `elicitation.form` support, a dispatch-gated tool call offered an `inputRequired` confirmation could still complete after the human declined or cancelled, or the elicitation response was omitted or malformed, provided the client echoed the validly bound `requestState` on resubmission. The server trusted an authentic, call-bound state as proof of approval even though that state was minted before the `elicitation/create` leg was asked and proved only that the resubmission belonged to the same call. A client behaving incorrectly or under an attacker's control could therefore execute dispatch-gated destructive vault operations without the human's approval, while still requiring the caller's ordinary tool permissions. Only tools marked `destructive: true` or requiring a scope with a human-in-the-loop floor were reachable through this bypass. The sixteen handler-side conditionally gated tools, including `write_note` overwrite and `move_note`, did not read elicitation state on the modern wire and let neither approval nor decline through that path. Affected deployments using stdio or leaving `auth.jwtSecret` unset instead used the CLI `elicit_token` fallback and did not offer this `requestState` round trip. The fix does not prevent a malicious client from reporting a fabricated approval, because the server cannot verify that the client displayed the form or that a human saw it. This issue is fixed in version 1.31.4.","state":0,"publishedAt":"2026-10-23T14:04:33.518+00:00","modifiedAt":"2026-10-23T14:04:33.518+00:00","affected":[{"ecosystem":"Vendor product","name":"obsidian-tc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"The-40-Thieves\",\n                    \"product\": \"obsidian-tc\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.13.0, < 1.31.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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,"severity":"HIGH"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-737x-cwfr-5vvc","https://github.com/The-40-Thieves/obsidian-tc/issues/967","https://github.com/The-40-Thieves/obsidian-tc/pull/969","https://github.com/The-40-Thieves/obsidian-tc/commit/101c91c656e2c2b88bcf3696a5da035f8c032c71","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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115477","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115477","identifiers":["CVE-2026-115477"]},"retained":false,"historicalAffected":[]},{"revision":"076248db5d84430db624b1aaea08de0b","observedAt":"2026-10-28T00:56:21.602+00:00","statement":{"source":"euvd","id":"EUVD-2026-109082","aliases":["CVE-2026-115477","GHSA-737x-cwfr-5vvc"],"title":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.13.0 until 1.31.4, on a Streamable HTTP deployment with `auth.jwtSecret` configured and a 2026-07-28-era client declaring `elicitation.form` su…","description":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.13.0 until 1.31.4, on a Streamable HTTP deployment with `auth.jwtSecret` configured and a 2026-07-28-era client declaring `elicitation.form` support, a dispatch-gated tool call offered an `inputRequired` confirmation could still complete after the human declined or cancelled, or the elicitation response was omitted or malformed, provided the client echoed the validly bound `requestState` on resubmission. The server trusted an authentic, call-bound state as proof of approval even though that state was minted before the `elicitation/create` leg was asked and proved only that the resubmission belonged to the same call. A client behaving incorrectly or under an attacker's control could therefore execute dispatch-gated destructive vault operations without the human's approval, while still requiring the caller's ordinary tool permissions. Only tools marked `destructive: true` or requiring a scope with a human-in-the-loop floor were reachable through this bypass. The sixteen handler-side conditionally gated tools, including `write_note` overwrite and `move_note`, did not read elicitation state on the modern wire and let neither approval nor decline through that path. Affected deployments using stdio or leaving `auth.jwtSecret` unset instead used the CLI `elicit_token` fallback and did not offer this `requestState` round trip. The fix does not prevent a malicious client from reporting a fabricated approval, because the server cannot verify that the client displayed the form or that a human saw it. This issue is fixed in version 1.31.4.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","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,"severity":null}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-737x-cwfr-5vvc","https://github.com/The-40-Thieves/obsidian-tc/issues/967","https://github.com/The-40-Thieves/obsidian-tc/pull/969","https://github.com/The-40-Thieves/obsidian-tc/commit/101c91c656e2c2b88bcf3696a5da035f8c032c71","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"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109082","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 23, 2026, 2:04:33 PM","dateUpdated":"Oct 23, 2026, 2:04:33 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-109082","identifiers":["EUVD-2026-109082","CVE-2026-115477","GHSA-737x-cwfr-5vvc"]},"retained":false,"historicalAffected":[]},{"revision":"f5b86d4c0bc64204b3e307cfcefa5488","observedAt":"2026-10-25T05:17:25.909+00:00","statement":{"source":"nvd","id":"CVE-2026-115477","aliases":[],"title":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.13.0 until 1.31.4, on a Streamable HTTP deployment with `auth.jwtSecret` configured and a 2026-07-28-era client declaring `elicitation.form` su…","description":"obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. From 1.13.0 until 1.31.4, on a Streamable HTTP deployment with `auth.jwtSecret` configured and a 2026-07-28-era client declaring `elicitation.form` support, a dispatch-gated tool call offered an `inputRequired` confirmation could still complete after the human declined or cancelled, or the elicitation response was omitted or malformed, provided the client echoed the validly bound `requestState` on resubmission. The server trusted an authentic, call-bound state as proof of approval even though that state was minted before the `elicitation/create` leg was asked and proved only that the resubmission belonged to the same call. A client behaving incorrectly or under an attacker's control could therefore execute dispatch-gated destructive vault operations without the human's approval, while still requiring the caller's ordinary tool permissions. Only tools marked `destructive: true` or requiring a scope with a human-in-the-loop floor were reachable through this bypass. The sixteen handler-side conditionally gated tools, including `write_note` overwrite and `move_note`, did not read elicitation state on the modern wire and let neither approval nor decline through that path. Affected deployments using stdio or leaving `auth.jwtSecret` unset instead used the CLI `elicit_token` fallback and did not offer this `requestState` round trip. The fix does not prevent a malicious client from reporting a fabricated approval, because the server cannot verify that the client displayed the form or that a human saw it. This issue is fixed in version 1.31.4.","state":0,"publishedAt":"2026-10-23T15:17:29.84+00:00","modifiedAt":"2026-10-23T15:17:29.967+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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","score":7.1,"severity":"HIGH"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/blob/v1.31.4/CHANGELOG.md","https://github.com/The-40-Thieves/obsidian-tc/commit/101c91c656e2c2b88bcf3696a5da035f8c032c71","https://github.com/The-40-Thieves/obsidian-tc/issues/967","https://github.com/The-40-Thieves/obsidian-tc/pull/969","https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.31.4","https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-737x-cwfr-5vvc"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-115477","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-285","CWE-863"],"productCriteria":[],"sourceDates":{"published":"2026-10-23T15:17:29.840","lastModified":"2026-10-23T15:17:29.967"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-115477","identifiers":["CVE-2026-115477"]},"retained":false,"historicalAffected":[]},{"revision":"9ebe3b24d4d64a6c9f7c3da1bceda2f9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-737x-cwfr-5vvc","aliases":["CVE-2026-115477"],"title":"obsidian-tc: Declined human-in-the-loop confirmations can permit destructive calls over HTTP","description":"### Summary\nOn a Streamable HTTP deployment with `auth.jwtSecret` configured, serving a 2026-07-28-era client that declared `elicitation.form` support, a call to a dispatch-gated tool (`destructive: true`, or a scope with an HITL floor) that was offered an `inputRequired` confirmation could still complete after the human declined, cancelled, or the elicitation response was omitted or malformed, provided the client echoed the validly bound `requestState` on resubmission. The server trusted an authentic, call-bound state as proof of approval; the state is minted before the elicitation leg is asked, so it proves only that the resubmission belongs to the same call.\n\n### Details\nReproduced directly: a `destructive: true` tool call, offered `inputRequired`, answered with `{action: \"decline\"}` on the `elicitation/create` leg, still wrote. Present since the 2026-07-28 round trip shipped in v1.13.0 (THE-583). Only dispatch-gated tools were reachable; the sixteen handler-side conditionally gated tools (`write_note` overwrite, `move_note`, and others) did not read the elicitation state on the modern wire at all, so they neither let a decline nor an approval through.\n\n### Impact\nA client that echoes state after a decline can execute destructive vault operations (delete, cross-folder move, frontmatter replace, link rewrite) that the human explicitly refused. The precondition is a compliant client behaving incorrectly or a client under an attacker's control; the human's refusal is not enforced by the server.\n\n### Patches\nFixed in 1.31.4: the server now also requires the confirm leg's own response (`inputResponse`) to be `{action: \"accept\", content: {approve: true}}` before trusting the echoed state. A declined, cancelled or not-approved round renders the ordinary `elicit_required` error and is never offered a second round for the same declined confirmation. The same release adds server-initiated in-band confirmation on stdio (legacy era), so stdio agents no longer need to mint `elicit_token` themselves.\n\n### Not addressed\nA malicious or non-compliant client can still answer its own `elicitation/create` leg with an approval regardless of what the human said. The server cannot verify that the client rendered the form or that a human saw it; this is inherent to the client-driven half of the 2026-07-28 protocol. The legacy shim, where the server sends and owns the leg, does not share this gap.\n\n### Workarounds\nRun affected deployments over stdio, or leave `auth.jwtSecret` unset so the `requestState` codec (and therefore `inputRequired`) is never offered; both fall back to the CLI `elicit_token` path.\n\n### Credit\nReported in GH #967; found and closed under THE-1106 (PR #969); the residual is documented in SECURITY.md.\n\n### References\n- PR #969, GH #967, CHANGELOG `## [1.31.4] ### Security`\n- `packages/server/src/mcp/server.ts` (`tools/call` handler), `packages/server/src/vault/hitl.ts`","state":0,"publishedAt":"2026-10-23T17:30:10+00:00","modifiedAt":"2026-10-23T17:45:03.9056342+00:00","affected":[{"ecosystem":"npm","name":"obsidian-tc","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.13.0"},{"kind":"fixed","version":"1.31.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-737x-cwfr-5vvc","https://github.com/The-40-Thieves/obsidian-tc/issues/967","https://github.com/The-40-Thieves/obsidian-tc/pull/969","https://github.com/The-40-Thieves/obsidian-tc/commit/101c91c656e2c2b88bcf3696a5da035f8c032c71","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","https://nvd.nist.gov/vuln/detail/cve-2026-115477"],"sourceUrl":"https://github.com/advisories/GHSA-737x-cwfr-5vvc","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-737x-cwfr-5vvc","identifiers":["GHSA-737x-cwfr-5vvc","CVE-2026-115477"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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