CVE-2026-63756 json
SurrealDB before 3.1.0 Privilege Escalation via RPC Session Race Condition
published 2026-07-01 4 mo ago modified 2026-11-04 5 d ago also GHSA-4vgr-h27g-cf9p , EUVD-2026-45927
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
SurrealDB versions before 3.1.0 contain a time-of-check/time-of-use race condition in the HTTP /rpc endpoint that allows unauthenticated requests to inherit authenticated session state. Unauthenticated attackers can send concurrent requests to the /rpc endpoint while legitimate authenticated traffic is active to execute operations with hijacked user privileges.
Patch / fix
- crates.io surrealdb 3.1.0
- surrealdb surrealdb 3.1.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.2 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/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 |
| GitHub | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | surrealdb | <3.1.0 |
3.1.0 |
Affected products
- surrealdb surrealdb
Classification
- Weakness
-
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
References
-
github.com
/surrealdb/surrealdb/commit/2f53e6e86d1b87e38300e714cfd7aede1abe4c3d
web
-
github.com
/surrealdb/surrealdb/commit/fd800fc7c55afcdc97057d18cf7cb7f83557e702
web
-
github.com
/surrealdb/surrealdb/security/advisories/GHSA-4vgr-h27g-cf9p
vendor-advisory, web
-
vulncheck.com
/advisories/surrealdb-before-privilege-escalation-via-rpc-session-race-condition
third-party-advisory
-
github.com
/surrealdb/surrealdb
package
Sources
- CVE List CVE-2026-63756
- GitHub Advisory GHSA-4vgr-h27g-cf9p
- NVD CVE-2026-63756
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