{"id":"CVE-2026-103667","title":"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","summary":"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 im…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"gitea","product":"gitea","affected":["gitea < 28.0.0"],"patched":["gitea 28.0.0"],"published":"2026-10-06","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:25:29.217","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103667","references":[{"url":"https://blog.gitea.com/release-of-28.0.0/","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39398","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-7cq7-4v93-8wjm","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"tags":["nvd","cve.org"],"epss":0.0019,"epssPercentile":0.08602,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-07T20:16:50.727435Z"},"ingestedAt":"2026-10-06T20:16:42.498Z","slug":"CVE-2026-103667","body":"## Overview\n\nGitea'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.\n\n## Affected\n\n- `gitea < 28.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `gitea 28.0.0`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217745,"id":"CVE-2026-103667","ts":1791406428978,"field":"cvss","old":null,"new":"5.4"},{"seq":217744,"id":"CVE-2026-103667","ts":1791406428978,"field":"severity","old":"none","new":"medium"}]}