How severe is CVE-2026-46398?

CVE-2026-46398 has a CVSS 4.0 base score of 8.8, rated high severity.

Is CVE-2026-46398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-46398?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-46398 have an EU (EUVD) identifier?

Yes. CVE-2026-46398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34893.

When was CVE-2026-46398 published?

CVE-2026-46398 was published on 2026-06-05 and last updated on 2026-06-17.

CVE-2026-46398

CVE-2026-46398 is a high-severity vulnerability with a CVSS 4.0 base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-614.

Key facts

Severity: High (CVSS 4.0 base score 8.8)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34893
Weakness: CWE-614
Published: 2026-06-05
Last modified: 2026-06-17

Description

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 25.0.0 and prior to version 26.0.0, the haxcms_refresh_token cookie is set without the Secure flag. This allows it to be transmitted over unencrypted HTTP, making it vulnerable to theft via packet sniffing on the network. Version 26.0.0 fixes the issue.

Frequently asked questions

What is CVE-2026-46398?: HAX CMS helps manage microsite universe with PHP or NodeJs backends. Starting in version 25.0.0 and prior to version 26.0.0, the haxcms_refresh_token cookie is set without the Secure flag. This allows it to be transmitted over unencrypted HTTP, making it vulnerable to theft via packet sniffing on the network. Version 26.0.0 fixes the issue.
How severe is CVE-2026-46398?: CVE-2026-46398 has a CVSS 4.0 base score of 8.8, rated high severity.
Is CVE-2026-46398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-46398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-46398 have an EU (EUVD) identifier?: Yes. CVE-2026-46398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34893.
When was CVE-2026-46398 published?: CVE-2026-46398 was published on 2026-06-05 and last updated on 2026-06-17.

References

https://github.com/haxtheweb/issues/security/advisories/GHSA-g7v2-r32q-jf5v

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