{"id":"DEBIAN-CVE-2026-114134","details":"Black is the uncompromising Python code formatter. Prior to 26.10.1, the Black GitHub Action with use_pyproject: true accepts tool.black.required-version from pyproject.toml without validating that it is a released Black version specifier. An attacker who can submit a pull request can change that field to a direct reference to attacker-controlled code, causing the workflow to install and execute the code in the victim repository's GitHub Actions context. This issue is fixed in version 26.10.1.","modified":"2026-11-07T17:00:06.116833210Z","published":"2026-11-05T21:18:36.887Z","upstream":["CVE-2026-114134"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-114134"}],"affected":[{"package":{"name":"black","ecosystem":"Debian:12","purl":"pkg:deb/debian/black?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.1.0-1","23.10.0-1","23.10.1-1","23.11.0-1","23.3.0-1","23.3.0-1~exp1","23.7.0-1","23.9.1-1","24.1.1-1","24.10.0-1","24.10.0-2","24.10.0-3","24.2.0-1","24.4.0-1","24.4.0-2","24.4.2-1","24.4.2-2","24.4.2-2~0exp0","24.8.0-1","25.1.0-0exp","25.1.0-1","25.1.0-2","25.1.0-3","25.11.0-1","25.12.0-1","25.12.0-2","25.9.0-1","26.1.0-1","26.10.0-1","26.10.0-2","26.10.1-1","26.3.1-1","26.5.1-1","26.5.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114134.json"}},{"package":{"name":"black","ecosystem":"Debian:13","purl":"pkg:deb/debian/black?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.1.0-3","25.1.0-3+deb13u1","25.11.0-1","25.12.0-1","25.12.0-2","25.9.0-1","26.1.0-1","26.10.0-1","26.10.0-2","26.10.1-1","26.3.1-1","26.5.1-1","26.5.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114134.json"}},{"package":{"name":"black","ecosystem":"Debian:14","purl":"pkg:deb/debian/black?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.1.0-3","25.11.0-1","25.12.0-1","25.12.0-2","25.9.0-1","26.1.0-1","26.10.0-1","26.10.0-2","26.10.1-1","26.3.1-1","26.5.1-1","26.5.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-114134.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}