{"cve":"CVE-2021-23422","nvd":{"published":"2021-08-16T08:15:11.287","modified":"2026-06-17T03:38:44.067","status":"Modified","description":"This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing Inline Tag Command metadata is processed. When an arbitrary OS command is executed, the command output would be included in the HTML output.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-78"],"references":["https://github.com/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd","https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537646","https://github.com/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd","https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537646"],"products":["bikeshed_project:bikeshed"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-23422","score":0.00789,"percentile":0.56265,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-87cj-px37-rc3x","url":"https://osv.dev/vulnerability/GHSA-87cj-px37-rc3x","summary":"OS Command Injection in bikeshed","modified":"2024-09-04T21:24:00.598721Z","packages":[{"ecosystem":"PyPI","name":"bikeshed","purl":"pkg:pypi/bikeshed","ranges":["<3.0.0"],"fixed":["3.0.0"]}]},{"id":"PYSEC-2021-116","url":"https://osv.dev/vulnerability/PYSEC-2021-116","summary":"","modified":"2023-11-08T04:05:08.743769Z","packages":[{"ecosystem":"PyPI","name":"bikeshed","purl":"pkg:pypi/bikeshed","ranges":["<3.0.0"],"fixed":["3.0.0"]}]}],"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."]}