{"id":"CVE-2021-41190","aliases":["GHSA-mc8v-mgrf-8f4m"],"title":"Clarify Content-Type handling","summary":"Clarify Content-Type handling","severity":"low","cvss":3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N","vendor":"opencontainers","product":"github.com/opencontainers/distribution-spec","ecosystem":"go","affected":["github.com/opencontainers/distribution-spec < 1.0.1"],"patched":["github.com/opencontainers/distribution-spec 1.0.1"],"published":"2021-11-18","updated":"2026-07-08","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-mc8v-mgrf-8f4m","references":[{"url":"https://github.com/opencontainers/distribution-spec/security/advisories/GHSA-mc8v-mgrf-8f4m"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41190"},{"url":"https://github.com/opencontainers/distribution-spec/commit/ac28cac0557bcd3084714ab09f9f2356fe504923"},{"url":"https://github.com/opencontainers/distribution-spec"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TUZNDAH2B26VPBK342UC3BHZNLBUXGX"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4334HT7AZPLWNYHW4ARU6JBUF3VZJPZN"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A2RRFNTMFYKOTRKD37F5ANMCIO3GGJML"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DX63GRWFEI5RVMYV6XLMCG4OHPWZML27"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RZTO6N55WHKHIZI4IMLY2QFBPMVTAERM"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SQBCYJUIM5GVCMFUPRWKRZNXMMI5EFA4"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4OJ764CKKCWCVONHD4YXTGR7HZ7LRUV"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YIGVQWOA5XXCQXEOOKZX4CDAGLBDRPRX"},{"url":"http://www.openwall.com/lists/oss-security/2021/11/19/10"}],"tags":["osv","go"],"epss":0.02241,"epssPercentile":0.82099,"ingestedAt":"2026-07-09T18:56:36.627Z","slug":"CVE-2021-41190","body":"## Overview\n\n### Impact\nIn the OCI Distribution Specification version 1.0.0 and prior, the Content-Type header alone was used to determine the type of document during push and pull operations. Documents that contain both “manifests” and “layers” fields could be interpreted as either a manifest or an index in the absence of an accompanying Content-Type header. If a Content-Type header changed between two pulls of the same digest, a client may interpret the resulting content differently.\n\n### Patches\nThe OCI Distribution Specification will be updated to require that a `mediaType` value present in a manifest or index match the Content-Type header used during the push and pull operations.\n\n### Workarounds\nClients pulling from a registry may distrust the Content-Type header and reject an ambiguous document that contains both “manifests” and “layers” fields or “manifests” and “config” fields.\n\n### References\nhttps://github.com/opencontainers/image-spec/security/advisories/GHSA-77vh-xpmg-72qh\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in https://github.com/opencontainers/distribution-spec/\n* Email us at security@opencontainers.org\n\n\n## Affected packages\n\n- `github.com/opencontainers/distribution-spec < 1.0.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/opencontainers/distribution-spec 1.0.1`","depth":"sunlit","depthScore":17,"depthScoreParts":{"impact":16.5,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}