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Tracking
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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-8wpc-h4q6-8fxv | fast-jwt: createVerifier accepts unsigned JWTs when key is '' or null and algorithms is explicitly set |
Fri, 09 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 09 Oct 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Nearform
Nearform fast-jwt |
|
| Vendors & Products |
Nearform
Nearform fast-jwt |
Thu, 08 Oct 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.3.1, fast-jwt createVerifier accepts an unsigned JWT when key is an empty string or null and algorithms is a non-empty allowlist. Falsy synchronous keys bypass prepareKeyOrSecret, allowedAlgorithms remains active, hasKey is false, and the empty signature avoids the verifySignature gate. An attacker can therefore submit a token containing arbitrary claims without possessing a signing key, resulting in authentication or authorization bypass. Claim validators still run, and non-empty keys, an empty key without algorithms, and the async key resolver path do not have this behavior. This issue is fixed in version 6.3.1. | |
| Title | fast-jwt: createVerifier accepts unsigned JWTs when key is '' or null and algorithms is explicitly set | |
| Weaknesses | CWE-20 CWE-347 |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-09T14:32:14.931Z
Reserved: 2026-10-08T17:21:52.975Z
Link: CVE-2026-107720
Updated: 2026-10-09T14:32:07.692Z
Status : Deferred
Published: 2026-10-08T22:17:28.090
Modified: 2026-10-09T15:17:08.947
Link: CVE-2026-107720
No data.
OpenCVE Enrichment
Updated: 2026-10-09T00:15:13Z
Github GHSA