How severe is CVE-2026-44258?

CVE-2026-44258 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-44258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44258?

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.

Does CVE-2026-44258 have an EU (EUVD) identifier?

Yes. CVE-2026-44258 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29843.

When was CVE-2026-44258 published?

CVE-2026-44258 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-44258

CVE-2026-44258 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-78.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29843
Weakness: CWE-78
Published: 2026-05-12
Last modified: 2026-06-17

Description

efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the elfinder_checkRisk function validates target and targets for path traversal and home containment, but does not validate the dst (destination) parameter used by elfinder_paste. An attacker can copy or move files from within the home directory to any arbitrary destination by setting dst to a base64-encoded traversal path. This bypasses the protected=true security control. This vulnerability is fixed in 4.08.010.

Frequently asked questions

What is CVE-2026-44258?: efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the elfinder_checkRisk function validates target and targets for path traversal and home containment, but does not validate the dst (destination) parameter used by elfinder_paste. An attacker can copy or move files from within the home directory to any arbitrary destination by setting dst to a base64-encoded traversal path. This bypasses the protected=true security control. This vulnerability is fixed in 4.08.010.
How severe is CVE-2026-44258?: CVE-2026-44258 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-44258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-44258?: 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.
Does CVE-2026-44258 have an EU (EUVD) identifier?: Yes. CVE-2026-44258 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29843.
When was CVE-2026-44258 published?: CVE-2026-44258 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/efwGrp/efw4.X/security/advisories/GHSA-9g5w-qw96-jr3x

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