zot is ancontainer image/artifact registry based on the Open Container Initiative Distribution Specification. From 1.3.0 to 2.1.14, zot’s dist-spec authorization middleware infers the required action for PUT /v2/{name}/manifests/{reference} as create by default, and only switches to update when the tag already exists and reference != "latest". As a result, when latest already exists, a user who is allowed to create (but not allowed to update) can still pass the authorization check for an overwrite attempt of latest. This vulnerability is fixed in 2.1.15.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31801.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "1.3.0"
},
{
"fixed": "v2.1.15"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:zotregistry:zot:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.3.0"
},
{
"fixed": "2.1.15"
}
],
"source": "CPE_RANGE"
}
]
}