CVE-2026-19194
CAP JWT claims validation bypass using non-canonical claim names
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
The HashiCorp cap JWT validation library before version 0.14.0 is vulnerable to a claims validation bypass that may cause downstream applications to make authorization decisions using claim values different from those validated. Exploitation requires attacker-controlled claims in a JWT signed by a key trusted by the application. This vulnerability (CVE-2026-19194) is fixed in cap 0.14.0.
| CWE | CWE-178 |
| Vendor | hashicorp |
| Product | shared library |
| Published | Nov 13, 2026 |
| Last Updated | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
HashiCorp / Shared library
0 < 0.14.0
References
Credits
This issue was reported to HashiCorp by anaximand3r and doyensec-mohamed.