PatchTheCVECVE-2026-63761: SurrealDB before 3.1.0 silently substitutes the ES384 algorithm when a JWT access method is configured with AL
CVE-2026-63761 is a medium-severity flaw (CVSS 4.3) affecting surrealdb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
SurrealDB before 3.1.0 silently substitutes the ES384 algorithm when a JWT access method is configured with ALGORITHM ES512 (DEFINE ACCESS ... TYPE JWT ALGORITHM ES512), because the underlying jsonwebtoken crate (v10.x) has no ES512 variant and the mapping defaults to ES384 without any error, warning, or log message. Users who supply the correct P-521 key for ES512 experience authentication handshake failures due to the curve mismatch with ES384
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 80%) |
| CISA exploited list | No |
| Weakness | CWE-327 |
| Published | 2026-07-20 |
| Last modified | 2026-10-08 |
Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-63761?
surrealdb: upgrade to 3.1.0. Exact commands for each OS are on this page.
Is CVE-2026-63761 being exploited?
CVE-2026-63761 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-63761 affect?
CVE-2026-63761 affects surrealdb. Severity is medium (CVSS 4.3). SurrealDB before 3.1.0 silently substitutes the ES384 algorithm when a JWT access method is configured with ALGORITHM ES512 (DEFINE ACCESS ... TYPE JWT ALGORITHM ES512), because the underlying jsonwebtoken crate (v10.x) has no ES512 variant
How urgent is CVE-2026-63761?
Priority 20/100. No elevated risk signals yet.
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