{"id":"GHSA-6g9v-7gq3-p2c6","summary":"SurrealDB: Authenticated callers can read fields hidden by field-level SELECT permissions via error messages","details":"A record user with UPDATE access could read field values that field-level SELECT permissions hid from them. Arithmetic operators and `extend` embedded the raw operand into their error messages, and UPDATE permission checks evaluate against the unreduced document — so triggering such an error against a hidden field returned its value in the resulting error.\n\n### Impact\n\nA record user issues an UPDATE that performs an incompatible operation against a hidden field — e.g. `UPDATE person:me SET probe = email + 1` when `email` is a string — and reads the value from the returned error (`Tried to compute \"alice@example.com\" + 1 …`). One field per operation, but the attacker can repeat against any field on any record they can UPDATE.\n\n### Patches\n\nA patch has been introduced that replaces the raw operand in every `try_*` operator and in `extend` with the operand's type name (`\"string\"`, `\"int\"`, `\"array\"`, etc.).\n\n- Versions 3.1.0 and later are not affected by this issue.\n\n### Workarounds\n\nAffected users who are unable to update should not grant UPDATE permission on records whose field-level SELECT permissions are expected to hide values from the same caller.","aliases":["CVE-2026-63748"],"modified":"2026-09-04T20:25:35.469978Z","published":"2026-07-01T20:16:52Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-07-01T20:16:52Z","nvd_published_at":null,"cwe_ids":["CWE-209"]},"references":[{"type":"WEB","url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-6g9v-7gq3-p2c6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63748"},{"type":"WEB","url":"https://github.com/surrealdb/surrealdb/commit/0aaa332c79195e4c40275eb5224aed3d52f5cf90"},{"type":"PACKAGE","url":"https://github.com/surrealdb/surrealdb"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/surrealdb-before-information-disclosure-via-error-messages"}],"affected":[{"package":{"name":"surrealdb","ecosystem":"crates.io","purl":"pkg:cargo/surrealdb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-6g9v-7gq3-p2c6/GHSA-6g9v-7gq3-p2c6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}