{"id":"CVE-2026-102876","summary":"SurrealDB before 3.3.0 Cross-Tenant Access via Headers","details":"SurrealDB before 3.3.0 contains an authorization bypass in HTTP session construction where check_auth() verifies credentials against Surreal-Auth-NS and Surreal-Auth-DB headers but constructs sessions using Surreal-NS and Surreal-DB headers without validating access permissions. Attackers can authenticate as a user from one tenant while selecting another tenant's namespace and database to read, create, and modify records across tenant boundaries.","aliases":["GHSA-vx2p-7hhm-wv62"],"modified":"2026-10-04T02:31:02.237326722Z","published":"2026-09-29T20:01:06.088Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102876.json","unresolved_ranges":[{"extracted_events":[{"fixed":"3.3.0"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"fixed":"3.3.0"}],"source":"CPE_FIELD"},{"extracted_events":[{"fixed":"3.3.0"}],"source":"DESCRIPTION"}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102876.json"},{"type":"ADVISORY","url":"https://github.com/surrealdb/surrealdb/releases/tag/v3.3.0"},{"type":"ADVISORY","url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-vx2p-7hhm-wv62"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102876"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/surrealdb-before-3.3.0-cross-tenant-access-via-headers"},{"type":"FIX","url":"https://github.com/surrealdb/surrealdb/commit/5000e233b4a8b96689c82715c172061dcf711d31"},{"type":"PACKAGE","url":"https://github.com/surrealdb/surrealdb"},{"type":"ARTICLE","url":"https://github.com/surrealdb/surrealdb/blob/v3.2.4/surrealdb/server/src/ntw/auth.rs"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/surrealdb/surrealdb","events":[{"introduced":"0"},{"fixed":"5000e233b4a8b96689c82715c172061dcf711d31"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102876.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}