CVE-2026-63761

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-07-20. the CNA's CVSS baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 (which expects P-384), and tokens are rejected by external systems expecting genuine ES512 signatures. The flaw cannot be used to forge tokens or compromise data confidentiality or integrity, as ES384 remains cryptographically strong.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
Patch available. Sources: github.
generic

SurrealDB before 3.1.0 Algorithm Downgrade via ES512 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/surrealdb-before-algorithm-downgrade-via-es512
github Patch Available

ES512 silently downgraded to ES384 due to jsonwebtoken crate limitation · Advisory · surrealdb/surrealdb · GitHub

https://github.com/surrealdb/surrealdb/security/advisories/GHSA-fwg2-gr34-q3w8

Vendor Advisories for CVE-2026-63761(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
surrealdb—3.1.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 59× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:31 UTCEG score recompute
  3. 2026-09-09 11:59 UTCEG score recompute
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 22:58 UTCEG score recompute
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 11:57 UTCEG score recompute
  9. 2026-09-05 15:31 UTCEPSS rescore
  10. 2026-09-05 09:36 UTCEG score recompute
  11. 2026-09-04 05:07 UTCEPSS rescore
  12. 2026-09-02 14:12 UTCEPSS rescore
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-09-01 04:40 UTCEPSS rescore
  15. 2026-08-31 05:00 UTCEG score recompute
  16. 2026-08-31 05:00 UTCGHSA enrichment
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 02:40 UTCEG score recompute
  19. 2026-08-30 02:39 UTCGHSA enrichment
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-28 21:42 UTCEPSS rescore
  22. 2026-08-28 01:41 UTCEG score recompute
  23. 2026-08-28 01:41 UTCGHSA enrichment
  24. 2026-08-27 14:25 UTCEPSS rescore
  25. 2026-08-26 22:10 UTCEG score recompute
Show 75 more
  1. 2026-08-26 22:10 UTCGHSA enrichment
  2. 2026-08-26 14:46 UTCEPSS rescore
  3. 2026-08-25 15:40 UTCEG score recompute
  4. 2026-08-25 15:40 UTCGHSA enrichment
  5. 2026-08-25 13:49 UTCEPSS rescore
  6. 2026-08-24 12:56 UTCEG score recompute
  7. 2026-08-24 12:56 UTCGHSA enrichment
  8. 2026-08-23 10:35 UTCGHSA enrichment
  9. 2026-08-22 08:15 UTCEG score recompute
  10. 2026-08-22 08:15 UTCGHSA enrichment
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-21 05:54 UTCEG score recompute
  13. 2026-08-21 05:54 UTCGHSA enrichment
  14. 2026-08-20 22:55 UTCEPSS rescore
  15. 2026-08-20 03:33 UTCEG score recompute
  16. 2026-08-20 03:33 UTCGHSA enrichment
  17. 2026-08-19 17:04 UTCEPSS rescore
  18. 2026-08-19 00:52 UTCEG score recompute
  19. 2026-08-19 00:52 UTCGHSA enrichment
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-17 22:27 UTCEG score recompute
  22. 2026-08-17 22:27 UTCGHSA enrichment
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-16 20:00 UTCEG score recompute
  25. 2026-08-16 20:00 UTCGHSA enrichment
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-15 17:39 UTCEG score recompute
  28. 2026-08-15 17:39 UTCGHSA enrichment
  29. 2026-08-15 01:30 UTCEPSS rescore
  30. 2026-08-14 15:18 UTCEG score recompute
  31. 2026-08-14 15:18 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 12:57 UTCEG score recompute
  34. 2026-08-13 12:57 UTCGHSA enrichment
  35. 2026-08-12 13:51 UTCEPSS rescore
  36. 2026-08-12 10:37 UTCEG score recompute
  37. 2026-08-12 10:37 UTCGHSA enrichment
  38. 2026-08-11 08:16 UTCEG score recompute
  39. 2026-08-11 08:16 UTCGHSA enrichment
  40. 2026-08-11 00:00 UTCEPSS rescore
  41. 2026-08-10 05:55 UTCEG score recompute
  42. 2026-08-10 05:55 UTCGHSA enrichment
  43. 2026-08-09 13:47 UTCEPSS rescore
  44. 2026-08-09 03:35 UTCEG score recompute
  45. 2026-08-09 03:35 UTCGHSA enrichment
  46. 2026-08-08 16:37 UTCEPSS rescore
  47. 2026-08-08 01:15 UTCEG score recompute
  48. 2026-08-08 01:15 UTCGHSA enrichment
  49. 2026-08-06 22:55 UTCEG score recompute
  50. 2026-08-06 22:54 UTCGHSA enrichment
  51. 2026-08-06 13:47 UTCEPSS rescore
  52. 2026-08-05 20:29 UTCEG score recompute
  53. 2026-08-05 20:29 UTCGHSA enrichment
  54. 2026-08-05 19:17 UTCEPSS rescore
  55. 2026-08-05 19:17 UTCEPSS rescore
  56. 2026-08-04 18:08 UTCEG score recompute
  57. 2026-08-04 18:08 UTCGHSA enrichment
  58. 2026-08-04 15:10 UTCEPSS rescore
  59. 2026-08-04 10:39 UTCEPSS rescore
  60. 2026-08-03 15:40 UTCEG score recompute
  61. 2026-08-03 15:40 UTCGHSA enrichment
  62. 2026-08-03 10:36 UTCEPSS rescore
  63. 2026-08-02 13:20 UTCEG score recompute
  64. 2026-08-02 13:20 UTCGHSA enrichment
  65. 2026-08-02 02:27 UTCEPSS rescore
  66. 2026-08-01 10:59 UTCEG score recompute
  67. 2026-08-01 10:59 UTCGHSA enrichment
  68. 2026-08-01 04:16 UTCEPSS rescore
  69. 2026-07-31 08:38 UTCEG score recompute
  70. 2026-07-31 08:38 UTCGHSA enrichment
  71. 2026-07-30 16:28 UTCEPSS rescore
  72. 2026-07-30 06:16 UTCEG score recompute
  73. 2026-07-30 06:16 UTCGHSA enrichment
  74. 2026-07-30 01:30 UTCEPSS rescore
  75. 2026-07-30 01:30 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63761?
CVE-2026-63761 is a medium vulnerability published on July 20, 2026. 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,…
When was CVE-2026-63761 disclosed?
CVE-2026-63761 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63761 actively exploited?
CVE-2026-63761 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.9% of all scored CVEs.
What is the CVSS score of CVE-2026-63761?
CVE-2026-63761 has a CVSS v4.0 base score of 4.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63761?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63761, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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