CVE-2026-46391
Authentication bypass in HAX CMS via substring hostname checks.
Is CVE-2026-46391 being exploited?
Not confirmed. CVE-2026-46391 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-46391?
CVE-2026-46391 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-46391?
Yes. A fix has been recorded for CVE-2026-46391. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-46391 affect?
CVE-2026-46391 affects HAX CMS, @haxtheweb/open-apis < 26.0.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-46391?
Upgrade to open-apis 26.0.0+ and update HAX CMS
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can capture authentication tokens by abusing hostname substring validation; possible session hijack.
Patch when possible
- affected>= 9.0.1 and < 26.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.