{"id":"CVE-2025-71395","aliases":["EUVD-2025-210486","GHSA-3633-g6mg-p6qq","GHSA-849x-5qr7-wxfm"],"status":"published","title":"SurrealDB before 2.2.2 Memory Exhaustion via string::replace","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0045,"percentile":0.39614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-789"],"published":"2025-04-11T14:08:03Z","modified":"2026-10-31T02:30:26Z","fixes":[{"ecosystem":"crates.io","package":"surrealdb","fixed_in":["2.2.2","2.1.5","2.0.5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.2.2"}]}]},{"source":"ghsa","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.0"},{"fixed":"2.1.5"}]}]},{"source":"ghsa","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.5"}]}]},{"source":"osv","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"SEMVER","events":[{"introduced":"2.2.0"},{"fixed":"2.2.2"}]}]},{"source":"osv","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"SEMVER","events":[{"introduced":"2.1.0"},{"fixed":"2.1.5"}]}]},{"source":"osv","ecosystem":"crates.io","package":"surrealdb","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.0.5"}]}]}],"products":[{"vendor":"surrealdb","product":"surrealdb"}],"references":[{"url":"https://github.com/surrealdb/surrealdb/security/advisories/GHSA-3633-g6mg-p6qq","tags":["vendor-advisory","Vendor Advisory","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/surrealdb-before-memory-exhaustion-via-string-replace","tags":["third-party-advisory","Third Party Advisory","advisory"]},{"url":"https://github.com/surrealdb/surrealdb/pull/5619","tags":["web"]},{"url":"https://github.com/surrealdb/surrealdb/pull/5638","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3633-g6mg-p6qq"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71395","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-849x-5qr7-wxfm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71395.json","tags":["advisory"]},{"url":"https://github.com/surrealdb/surrealdb","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-71395","title":"SurrealDB before 2.2.2 Memory Exhaustion via string::replace","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","status":"published","published":"2026-07-18T13:10:13.744Z","modified":"2026-10-29T21:15:22.098Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:32:43.10004Z"}],"euvd":[{"id":"EUVD-2025-210486","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","status":"published","published":"2026-07-18T13:10:13Z","modified":"2026-10-29T21:15:22Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:14.250155Z"}],"ghsa":[{"id":"GHSA-3633-g6mg-p6qq","title":"SurrealDB memory exhaustion via string::replace using regex ","description":"An authenticated user can craft a query using the `string::replace` function that uses a Regex to perform a string replacement. As there is a failure to restrict the resulting string length, this enables an attacker to send a `string::replace` function to the SurrealDB server exhausting all the memory of the server due to string allocations. This eventually results in a Denial-of-Service situation for the SurrealDB server.\n\nThis issue was discovered and patched during an code audit and penetration test of SurrealDB by cure53. Using CVSSv4 definitions, the severity is High. \n\n### Impact\nAn authenticated user can crash the SurrealDB instance through memory exhaustion\n\n### Patches\nA patch has been created that enforces a limit on string length  `SURREAL_GENERATION_ALLOCATION_LIMIT`\n\n- Versions 2.0.5, 2.1.5, 2.2.2, and later are not affected by this issue\n\n### Workarounds\nAffected users who are unable to update may want to limit the ability of untrusted clients to run the `string::replace` function in the affected versions of SurrealDB using the `--deny-functions` flag described within [Capabilities](https://surrealdb.com/docs/surrealdb/security/capabilities#functions) or the equivalent `SURREAL_CAPS_DENY_FUNC` environment variable.\n\n### References\n\n[SurrealQL Documentation - DB Functions (string::replace)](https://surrealdb.com/docs/surrealql/functions/database/string#stringreplace)\n[SurrealDB Documentation - Capabilities](https://surrealdb.com/docs/surrealdb/security/capabilities#functions)\n[SurrealDB Documentation - Environment Variables](https://surrealdb.com/docs/surrealdb/cli/env)\n[#5619 ](https://github.com/surrealdb/surrealdb/pull/5619)\n[#5638 ](https://github.com/surrealdb/surrealdb/pull/5638)","status":"published","published":"2025-04-11T14:08:03Z","modified":"2025-04-11T14:08:06Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:38:39.044439Z"},{"id":"GHSA-849x-5qr7-wxfm","title":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace...","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","status":"published","published":"2026-07-18T15:31:49Z","modified":"2026-08-19T18:32:00Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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","level":"high"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:10:40.943268Z"}],"nvd":[{"id":"CVE-2025-71395","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","status":"published","published":"2026-07-18T14:17:10.963Z","modified":"2026-10-29T21:17:06.19Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:12:02.535029Z"}],"osv":[{"id":"CVE-2025-71395","title":"SurrealDB before 2.2.2 Memory Exhaustion via string::replace","description":"SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.","status":"published","published":"2026-07-18T13:10:13.744Z","modified":"2026-10-31T02:30:26.151635913Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:44:53.185592Z"},{"id":"GHSA-3633-g6mg-p6qq","title":"SurrealDB memory exhaustion via string::replace using regex ","description":"An authenticated user can craft a query using the `string::replace` function that uses a Regex to perform a string replacement. As there is a failure to restrict the resulting string length, this enables an attacker to send a `string::replace` function to the SurrealDB server exhausting all the memory of the server due to string allocations. This eventually results in a Denial-of-Service situation for the SurrealDB server.\n\nThis issue was discovered and patched during an code audit and penetration test of SurrealDB by cure53. Using CVSSv4 definitions, the severity is High. \n\n### Impact\nAn authenticated user can crash the SurrealDB instance through memory exhaustion\n\n### Patches\nA patch has been created that enforces a limit on string length  `SURREAL_GENERATION_ALLOCATION_LIMIT`\n\n- Versions 2.0.5, 2.1.5, 2.2.2, and later are not affected by this issue\n\n### Workarounds\nAffected users who are unable to update may want to limit the ability of untrusted clients to run the `string::replace` function in the affected versions of SurrealDB using the `--deny-functions` flag described within [Capabilities](https://surrealdb.com/docs/surrealdb/security/capabilities#functions) or the equivalent `SURREAL_CAPS_DENY_FUNC` environment variable.\n\n### References\n\n[SurrealQL Documentation - DB Functions (string::replace)](https://surrealdb.com/docs/surrealql/functions/database/string#stringreplace)\n[SurrealDB Documentation - Capabilities](https://surrealdb.com/docs/surrealdb/security/capabilities#functions)\n[SurrealDB Documentation - Environment Variables](https://surrealdb.com/docs/surrealdb/cli/env)\n[#5619 ](https://github.com/surrealdb/surrealdb/pull/5619)\n[#5638 ](https://github.com/surrealdb/surrealdb/pull/5638)","status":"published","published":"2025-04-11T14:08:03Z","modified":"2026-07-19T03:56:48.028669788Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:46:35.406455Z"}]}}