How severe is CVE-2026-56058?

CVE-2026-56058 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-56058 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-56058?

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-2026-56058 published?

CVE-2026-56058 was published on 2026-06-26.

CVE-2026-56058

CVE-2026-56058 is a critical-severity vulnerability with a CVSS 3.x base score of 9.9. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Published: 2026-06-26
Last modified: 2026-06-26

Description

Subscriber Arbitrary File Upload in Quform <= 2.23.0 versions.

Frequently asked questions

What is CVE-2026-56058?: Subscriber Arbitrary File Upload in Quform <= 2.23.0 versions.
How severe is CVE-2026-56058?: CVE-2026-56058 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-56058 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-56058?: 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-2026-56058 published?: CVE-2026-56058 was published on 2026-06-26.

References

https://patchstack.com/database/wordpress/plugin/quform/vulnerability/wordpress-quform-plugin-2-23-0-arbitrary-file-upload-vulnerability?_s_id=cve

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