CVE-2026-44593

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Source
https://cve.org/CVERecord?id=CVE-2026-44593
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44593.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44593
Aliases
Downstream
Related
Published
2026-05-28T14:44:20.782Z
Modified
2026-07-31T18:30:00.110955607Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
esm.sh: Legacy Route Path Traversal Can Lead to RCE
Details

esm.sh is a no-build content delivery network (CDN) for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components without sanitizing them, producing a storage key. When this key is used, the underlying file system resolves the relative segments and writes the file to the specified path. Thus an attacker can craft a request that writes data to arbitrary locations on the server.

Database specific 
{
    "cwe_ids": [
        "CWE-22"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44593.json"
}
References

Affected packages

Git / github.com/esm-dev/esm.sh

Affected ranges

Type
GIT
Repo
https://github.com/esm-dev/esm.sh
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
2ff321d847219cf2c8152efeea3a20a72ee80f64
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "137"
        }
    ]
}

Affected versions

Other
v100
v101
v102
v103
v104
v105
v106
v107
v108
v109
v110
v111
v112
v113
v114
v115
v116
v117
v119
v120
v121
v122
v123
v124
v125
v126
v127
v128
v129
v130
v131
v132
v133
v134
v135
v135_1
v136
v136_1
v137
v34
v35
v37
v38
v39
v40
v41
v43
v44
v45
v46
v47
v49
v50
v51
v52
v53
v55
v56
v57
v59
v60
v61
v62
v63
v64
v65
v66
v67
v68
v69
v70
v71
v72
v73
v74
v75
v76
v77
v78
v79
v80
v81
v82
v83
v84
v85
v86
v87
v88
v89
v90
v91
v92
v93
v94
v95
v96
v97
v98
v99

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44593.json"