Gitea's container registry served blob downloads with a Content-Type taken from the media type declared in pushed image manifests, without a Content-Disposition or restrictive content security policy. A user who can push container images can publish a blob containing HTML and JavaScript with a text/html media type. When a victim who is authenticated to the instance opens the blob URL in a browser, the script runs on the Gitea origin and can perform actions as the victim, such as creating API tokens.
{
"cna_assigner": "Gitea",
"cwe_ids": [
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103667.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "28.0.0"
}
],
"source": "CPE_RANGE"
},
{
"original_tag": "v28.0.0",
"range": [
{
"fixed": "15b8a5805adf57c5189602008d38cccfd3c795e0"
}
],
"source": "REFERENCES_TAG"
}
]
}