CVE-2026-44973 | Billy is an interface filesystem abstraction for Go. Prior t… | CVSS 8.1 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-44973
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-08 16:23 UTC
Published: 2026-05-28 21:26 UTC
Last updated: 2026-06-01 18:41 UTC
Primary CWE: CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product: go-git / go-billy
Sources: cve.org · NVD

Severity & Metrics

8.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
go-git	go-billy	—	< 5.9.0

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References (1)

https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2 https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2