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CVE-2026-21790

HCL Traveler is susceptible to a weak default HTTP header validation vulnerability

MEDIUM
6.3
CVSS Score
Published: March 24, 2026 at 08:04 PM UTC
Updated: June 17, 2026 at 10:19 AM UTC
1 product affected across 1 vendorTraveler

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Traveler· Hcltech
60%
v < 14.5.1.0
Affected range stops below 14.5.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0129139

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMHCL
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-346

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