{"id":"CVE-2021-41190","aliases":["GHSA-mc8v-mgrf-8f4m"],"url":"https://o3.security/vulnerability/CVE-2021-41190","summary":"Clarify Content-Type handling","details":"### 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","published":"2021-11-17T20:15:10.333Z","modified":"2026-07-08T06:26:57.143728803Z","cvss":{"score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/opencontainers/distribution-spec","fixedVersion":"1.0.1"}],"fix":{"url":"https://github.com/opencontainers/distribution-spec/commit/ac28cac0557bcd3084714ab09f9f2356fe504923","label":"opencontainers/distribution-spec@ac28cac"},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TUZNDAH2B26VPBK342UC3BHZNLBUXGX/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4334HT7AZPLWNYHW4ARU6JBUF3VZJPZN/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A2RRFNTMFYKOTRKD37F5ANMCIO3GGJML/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DX63GRWFEI5RVMYV6XLMCG4OHPWZML27/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RZTO6N55WHKHIZI4IMLY2QFBPMVTAERM/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SQBCYJUIM5GVCMFUPRWKRZNXMMI5EFA4/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4OJ764CKKCWCVONHD4YXTGR7HZ7LRUV/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YIGVQWOA5XXCQXEOOKZX4CDAGLBDRPRX/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/11/19/10"},{"type":"ADVISORY","url":"https://github.com/opencontainers/distribution-spec/security/advisories/GHSA-mc8v-mgrf-8f4m"},{"type":"FIX","url":"https://github.com/opencontainers/distribution-spec/commit/ac28cac0557bcd3084714ab09f9f2356fe504923"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41190"},{"type":"PACKAGE","url":"https://github.com/opencontainers/distribution-spec"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TUZNDAH2B26VPBK342UC3BHZNLBUXGX"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4334HT7AZPLWNYHW4ARU6JBUF3VZJPZN"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A2RRFNTMFYKOTRKD37F5ANMCIO3GGJML"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DX63GRWFEI5RVMYV6XLMCG4OHPWZML27"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RZTO6N55WHKHIZI4IMLY2QFBPMVTAERM"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SQBCYJUIM5GVCMFUPRWKRZNXMMI5EFA4"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4OJ764CKKCWCVONHD4YXTGR7HZ7LRUV"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YIGVQWOA5XXCQXEOOKZX4CDAGLBDRPRX"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:26:57.143728803Z"}}