CVE-2026-89315
Published:October 23, 2026
Updated:October 23, 2026
"JwtClaims.MarshalJSON" built a Go struct at runtime with "reflect.StructOf", synthesising a field named ""A" + claimName" for each untyped claim. "reflect.StructOf" panics when a field name is not a valid Go identifier, or when it duplicates another field. Both conditions are reachable from ordinary JWT claim names.
Affected Packages
https://github.com/eclipse-keypont/gose.git (GITHUB):
Affected version(s) >=v0.7.3 <v1.0.0-rc4Fix Suggestion:
Update to version v1.0.0-rc4github.com/eclipse-keypont/gose (GO):
Affected version(s) >=v0.13.0-rc1 <v1.0.0-rc4Fix Suggestion:
Update to version v1.0.0-rc4Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (1)
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Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Uncaught Exception