How severe is CVE-2026-84388?

CVE-2026-84388 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-84388 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

How do I fix CVE-2026-84388?

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

When was CVE-2026-84388 published?

CVE-2026-84388 was published on 2026-09-22.

CVE-2026-84388

CVE-2026-84388 is a critical-severity vulnerability with a CVSS 3.x base score of 9.6. The underlying weakness is classified as CWE-1021.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1021
Published: 2026-09-22
Last modified: 2026-09-22

Description

A improper restriction of rendered ui layers or frames vulnerability in Fortinet FortiPAM Chrome Extension 8.0 all versions, FortiPAM Chrome Extension 7.4 all versions may allow attacker to information disclosure via remote unauthenticated attack

Frequently asked questions

What is CVE-2026-84388?: A improper restriction of rendered ui layers or frames vulnerability in Fortinet FortiPAM Chrome Extension 8.0 all versions, FortiPAM Chrome Extension 7.4 all versions may allow attacker to information disclosure via remote unauthenticated attack
How severe is CVE-2026-84388?: CVE-2026-84388 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-84388 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
How do I fix CVE-2026-84388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-84388 published?: CVE-2026-84388 was published on 2026-09-22.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-168

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