CVSS 3.1
4.4 mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:NCVE-2026-41164
Medium (4.4). EPSS 0.08% chance of exploitation in the next 30 days.
nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint (/auth/v1/introspect_access_token) accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation (VP) JWT to be replayed as an access token and receive an active: true introspection response. This vulnerability is fixed in 6.2.3 and 5.4.31.
Severity
- EPSS
- 0.08% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-31)
- CWE
- CWE-345
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9hmg-827w-9rhj | Go | github.com/nuts-foundation/nuts-node | <=1.1.0 | no fix published |
| GO-2026-5291 | Go | github.com/nuts-foundation/nuts-node | all versions | no fix published |