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Vulnerability record · CVE-2026-44973 · published 28 May 2026

CVE-2026-44973: Path traversal vulnerability

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.

8.1 CVSS 3.1 High EPSS 0.47% · top 62.0% CWE-22 · Path traversal Deferred
8.1CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
21 Jul 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-44973), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.