CVE-2026-46391: @haxtheweb/open-apis · Permissive List of Allowed Inputs
Affects @haxtheweb/open-apisSource CVE Database V5
Not known to be exploited · CVSS 8.7 High : upgrade to 26.0.0 soon.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 39% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 26.0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 5 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade @haxtheweb/open-apis to 26.0.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| haxtheweb@haxtheweb/open-apis | Affected
| Fixed in
|
npm@haxtheweb/open-apispkg:npm/@haxtheweb/open-apisOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade to version 26.0.0 or later of @haxtheweb/open-apis, where the hostname validation issue is fixed. No other official remediation or temporary fix is documented. Patch status is not explicitly confirmed by a vendor advisory, but the version 26.0.0 release is identified as the fix.
Description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 9.0.1 and prior to version 26.0.0 of @haxtheweb/open-apis, multiple functions conduct substring-only matching to validate hostnames to which basic authorization should be sent. An attacker can append the matched substrings to an attacker-controlled endpoint and capture authentication. Version 26.0.0 fixes the issue.