CVE-2026-63761PublishedWithdrawn

SurrealDB before 3.1.0 Algorithm Downgrade via ES512

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-63761

Published

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.

Source published: 20 Jul 2026 12:04:50 UTC
Source modified: 8 Oct 2026 15:23:50 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1 · 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

euvd · EUVD-2026-45932

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 20, 2026, 12:04:50 PM

dateUpdated: Oct 8, 2026, 3:23:50 PM

Source published: Jul 20, 2026, 12:04:50 PM (timezone not stated)
Source modified: Oct 8, 2026, 3:23:50 PM (timezone not stated)
Observed here: 9 Nov 2026 14:13:48 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

nvd · CVE-2026-63761

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-327

Original publisher date fields

published: 2026-07-20T12:19:46.330

lastModified: 2026-10-08T16:17:28.117

1 source CPE criteria · context only

cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 20 Jul 2026 12:19:46 UTC
Source modified: 8 Oct 2026 16:17:28 UTC
Observed here: 25 Oct 2026 15:18:45 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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

CVSS 3.1 · [email protected] · Secondary · 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

osv · GHSA-fwg2-gr34-q3w8

Published

When a user configures `ALGORITHM ES512` for any JWT access method (`DEFINE ACCESS ... TYPE JWT ALGORITHM ES512`), SurrealDB silently substitutes ES384 at all four internal algorithm conversion points. This occurs because the underlying `jsonwebtoken` crate (v10.x) does not include an ES512 algorithm variant, so the mapping defaults to ES384 without raising an error, warning, or log message. Users who provide the correct P-521 key type for ES512 will experience authentication handshake failures due to the curve mismatch with ES384 (which expects P-384). ### Impact Authentication handshake failures when using ES512 with the correct P-521 key type, and when tokens are verified by external systems expecting real ES512 signatures. This vulnerability cannot be exploited to forge tokens or compromise the integrity or confidentiality of data handled by SurrealDB, as ES384 remains cryptographically strong. ### Patches Versions prior to SurrealDB `v3.1.0` are vulnerable. The patches for SurrealDB `v3.1.0` block new `DEFINE ACCESS` statements using `ALGORITHM ES512` with a clear error message and add deprecation warnings at runtime for existing stored ES512 definitions. ### Workarounds Users should reconfigure affected JWT access methods to use a supported algorithm such as ES384 (with a P-384 key pair) or another supported algorithm. Review any `DEFINE ACCESS` statements specifying `ALGORITHM ES512` and update them accordingly.

Source published: 1 Jul 2026 20:23:01 UTC
Source modified: 4 Sep 2026 20:55:31 UTC
Observed here: 24 Oct 2026 13:19:54 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Publisher rating · MODERATE

osv · GHSA-gw59-x2xr-wwvr

Withdrawn

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-fwg2-gr34-q3w8. This link is maintained to preserve external references. ## Original Description 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.

Source published: 20 Jul 2026 12:33:11 UTC
Source modified: 4 Sep 2026 20:45:04 UTC
Observed here: 24 Oct 2026 13:19:54 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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

Publisher rating · MODERATE