HCL Traveler 3.0.11/3.0.12/3.0.14 HTTP Header Validation origin validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.32

Summaryinfo

A vulnerability classified as critical was found in HCL Traveler. Affected by this issue is some unknown functionality of the component HTTP Header Validation Handler. Executing a manipulation can lead to origin validation. This vulnerability is registered as CVE-2026-21790. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in HCL Traveler. It has been declared as critical. This vulnerability affects an unknown function of the component HTTP Header Validation Handler. The manipulation with an unknown input leads to a origin validation vulnerability. The CWE definition for the vulnerability is CWE-346. The product does not properly verify that the source of data or communication is valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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

The advisory is available at support.hcl-software.com. This vulnerability was named CVE-2026-21790 since 01/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 14.5.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-15002). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.3
CNA Vector (HCL): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Origin validation
CWE: CWE-346 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Traveler 14.5.1.0

Timelineinfo

01/05/2026 CVE reserved
03/24/2026 +78 days Advisory disclosed
03/24/2026 +0 days VulDB entry created
03/29/2026 +5 days VulDB entry last update

Sourcesinfo

Advisory: KB0129139
Status: Confirmed

CVE: CVE-2026-21790 (🔒)
GCVE (CVE): GCVE-0-2026-21790
GCVE (VulDB): GCVE-100-352870
EUVD: 🔒

Entryinfo

Created: 03/24/2026 21:33
Updated: 03/29/2026 14:15
Changes: 03/24/2026 21:33 (64), 03/25/2026 01:35 (1), 03/29/2026 14:15 (1)
Complete: 🔍
Cache ID: 216:904:103

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