{"id":"UBUNTU-CVE-2026-44973","details":"Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0.","modified":"2026-06-03T11:25:22Z","published":"2026-05-28T22:16:00Z","upstream":["CVE-2026-44973"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44973"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44973"},{"type":"REPORT","url":"https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2"}],"affected":[{"package":{"name":"golang-github-go-git-go-billy","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.1-2","5.3.1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-go-git-go-billy-dev","binary_version":"5.3.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"}},{"package":{"name":"golang-github-go-git-go-billy","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-go-git-go-billy-dev","binary_version":"5.3.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"}},{"package":{"name":"golang-github-go-git-go-billy","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.5.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.5.0-1","binary_name":"golang-github-go-git-go-billy-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"}},{"package":{"name":"golang-github-go-git-go-billy","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-github-go-git-go-billy?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.5.0-1","5.5.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-go-git-go-billy-dev","binary_version":"5.5.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44973.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}