Vulnerability · Published May 12, 2026 · Assigned by GitHub_M

CVE-2026-44258efw4.X: Path Traversal via Unchecked dst Parameter leads to Remote Code Execution

Critical 9.3

In plain English

A critical-severity OS command injection in efw4.X from efwGrp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.4%top 70.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
efwGrp	efw4.X	< 4.08.010

Weakness: CWE-78 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

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