{"cve":"CVE-2021-29136","nvd":{"published":"2021-04-06T16:15:16.520","modified":"2026-06-17T03:47:20.523","status":"Modified","description":"Open Container Initiative umoci before 0.4.7 allows attackers to overwrite arbitrary host paths via a crafted image that causes symlink traversal when \"umoci unpack\" or \"umoci raw unpack\" is used.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":5.5},"cwes":["CWE-20"],"references":["http://www.openwall.com/lists/oss-security/2021/04/06/2","https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57","https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v","http://www.openwall.com/lists/oss-security/2021/04/06/2","https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57"],"products":["linuxfoundation:umoci","sylabs:singularity"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-29136","score":0.00344,"percentile":0.27956,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-9m95-8hx6-7p9v","url":"https://osv.dev/vulnerability/GHSA-9m95-8hx6-7p9v","summary":"Improper input validation in umoci","modified":"2026-07-08T06:28:59.258005536Z","packages":[{"ecosystem":"Go","name":"github.com/opencontainers/umoci","purl":"pkg:golang/github.com/opencontainers/umoci","ranges":["<0.4.7"],"fixed":["0.4.7"]}]},{"id":"GO-2022-0815","url":"https://osv.dev/vulnerability/GO-2022-0815","summary":"Improper input validation in umoci in github.com/opencontainers/umoci","modified":"2026-03-03T04:50:56.673388Z","packages":[{"ecosystem":"Go","name":"github.com/opencontainers/umoci","purl":"pkg:golang/github.com/opencontainers/umoci","ranges":["<0.4.7"],"fixed":["0.4.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}