CVE-2026-19194

CAP JWT claims validation bypass using non-canonical claim names

Published Nov 13, 2026 CVSS 3.1 · 5.9 Medium EPSS n/a KEV · Not listed
Description
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.

Analysis

No analysis available yet

Remediation

No remediation available yet

Tracking

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Advisories

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History
Type Values Removed Values Added
First Time appeared Hashicorp
Hashicorp shared Library
Vendors & Products Hashicorp
Hashicorp shared Library
Type Values Removed Values Added
Description 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.
Title CAP JWT claims validation bypass using non-canonical claim names
Weaknesses CWE-178
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N'}

Weaknesses
  • CWE-178

    Improper Handling of Case Sensitivity

Sources

Status
PUBLISHED
Assigner
HashiCorp
Published
Updated
Nov 13, 2026, 9:30 PM
Reserved
Aug 6, 2026, 8:09 PM
Status
Received
Published
Nov 13, 2026, 10:17 PM
Modified
Nov 13, 2026, 10:17 PM