HCL Traveler <14.5.1.0 Weak Header Validation Bypass
CVE-2026-21790 Published on March 24, 2026

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

NVD

Vulnerability Analysis

CVE-2026-21790 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
LOW
Availability Impact:
LOW

Weakness Type

Origin Validation Error

The software does not properly verify that the source of data or communication is valid.


Affected Versions

HCLSoftware Traveler Version < 14.5.1.0 is affected by CVE-2026-21790

Exploit Probability

EPSS
0.01%
Percentile
0.57%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.