CVE-2026-21790 | HCL Traveler 3.0.11/3.0.12/3.0.14 HTTP Header Validation origin validation (KB0129139)

VDB-352870 · CVE-2026-21790 · KB0129139 HCL TRAVELER 3.0.11/3.0.12/3.0.14 HTTP HEADER VALIDATION ORIGIN VALIDATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.1 $0-$5k 3.38+ 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. Productinfo Vendor HCL Name Traveler Version 3.0.11 3.0.12 3.0.14 License commercial 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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 03/24/2026 +0 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 Entryinfo Created: 03/24/2026 21:33 Changes: 03/24/2026 21:33 (64) Complete: 🔍 Cache ID: 99:205:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸