haxtheweb haxcms-php up to 25.x HTML File case sensitivity

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.78+

Summaryinfo

A vulnerability has been found in haxtheweb haxcms-php up to 25.x and classified as critical. Affected by this vulnerability is an unknown functionality of the component HTML File Handler. Performing a manipulation results in case sensitivity. This vulnerability was named CVE-2026-46392. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in haxtheweb haxcms-php up to 25.x. This affects an unknown part of the component HTML File Handler. The manipulation with an unknown input leads to a case sensitivity vulnerability. CWE is classifying the issue as CWE-178. The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0 of HAX CMS PHP, the `saveFile` endpoint validates upload extensions case-insensitively and writes the filename to disk verbatim, but the `.htaccess` rule that forces `Content-Disposition: attachment` on HTML files is case-sensitive. An HTML file uploaded with an uppercase extension (`.HTML`, `.Html`, `.HTM`) is still served as `text/html` but the forced-download header never applies, so the browser renders it inline and executes any embedded JavaScript in the HAXcms origin. This bypasses the mitigation shipped for CVE-2026-22704. Version 26.0.0 contains a fix.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-46392 since 05/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available.

Upgrading to version 26.0.0 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

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

CNA Base Score: 8.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

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

Exploitinginfo

Class: Case sensitivity
CWE: CWE-178 / CWE-697
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
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: haxcms-php 26.0.0

Timelineinfo

05/13/2026 CVE reserved
06/05/2026 +23 days Advisory disclosed
06/05/2026 +0 days VulDB entry created
06/05/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-hg33-w4j2-95qp
Status: Confirmed

CVE: CVE-2026-46392 (🔒)
GCVE (CVE): GCVE-0-2026-46392
GCVE (VulDB): GCVE-100-368973

Entryinfo

Created: 06/05/2026 23:58
Changes: 06/05/2026 23:58 (65)
Complete: 🔍
Cache ID: 216::103

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