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CVE-2026-21790

MEDIUM CVSS 3.1: 6.3 EPSS 0.01%
Updated Mar 25, 2026
HCL
Parameter Value
CVSS 6.3 (MEDIUM)
Type CWE-346 (Origin Validation Error)
Vendor HCL
Public PoC No

HCL Traveler is susceptible to a weak default HTTP header validation vulnerability, which could allow an attacker to bypass additional authentication checks.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v3.1