CVE-2026-44973
Billy: Path traversal vulnerabilities
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.
INFO
Published Date :
May 28, 2026, 10:16 p.m.
Last Modified :
July 21, 2026, 10:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-44973
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update go-billy to version 5.9.0 or later.
- Review and enforce path sanitization in file operations.
- Test filesystem access controls thoroughly.
- Limit user-controlled path inputs.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44973.
| URL | Resource |
|---|---|
| https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44973 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44973
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44973 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44973 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: go-billy de go-git, Description: Billy es una abstracción de interfaz de sistema de archivos para Go. Antes de 5.9.0, existen múltiples problemas de salto de ruta en diferentes componentes de go-billy. Una sanitización de rutas y una aplicación de límites insuficientes pueden permitir que rutas manipuladas (por ejemplo, usando ..) escapen de los directorios base previstos. Aunque go-billy no fue diseñado originalmente para proporcionar un límite de seguridad robusto, algunos de estos problemas eran inconsistentes en algunas de las implementaciones integradas. Esto da lugar a escenarios en los que las aplicaciones que dependen de go-billy para cierto nivel de aislamiento pueden exponer inadvertidamente el acceso a ubicaciones del sistema de archivos no deseadas. Esta vulnerabilidad está corregida en 5.9.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'go-git', 'product': 'go-billy', 'versions': [{'status': 'affected', 'version': '< 5.9.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44973', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-01T18:40:39.211860Z'} -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-22 Added Reference https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2