CVE-2026-44740
go-billy: Lack of depth and cycle detection in symlink resolution may lead to infinite loops and resource exhaustion
Description
Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient validation and missing safety mechanisms such as cycle detection, recursion limits, or defensive handling of unexpected states when processing untrusted repository data and filesystem structures. This issue has been patched in versions 5.9.0 and 6.0.0-alpha.1.
INFO
Published Date :
June 1, 2026, 5:17 p.m.
Last Modified :
July 22, 2026, 7:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-44740
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 | MEDIUM | [email protected] |
Solution
- Update Billy to version 5.9.0 or later.
- Update Billy to version 6.0.0-alpha.1 or later.
- Validate all input for malformed data.
- Implement safety mechanisms for recursion.
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-2026-44740.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44740 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-2026-44740
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-2026-44740 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44740 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. 22, 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 las versiones 5.9.0 y 6.0.0-alpha.1, múltiples componentes pueden manejar incorrectamente entradas manipuladas o malformadas, lo que resulta en panics, bucles infinitos, recursión incontrolada o consumo excesivo de recursos. Estos problemas surgen de una validación insuficiente y de la ausencia de mecanismos de seguridad como la detección de ciclos, límites de recursión o el manejo defensivo de estados inesperados al procesar datos de repositorio no confiables y estructuras de sistema de archivos. Este problema ha sido parcheado en las versiones 5.9.0 y 6.0.0-alpha.1. -
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'}, {'status': 'affected', 'version': '< 6.0.0-alpha.1'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44740', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-01T18:13:54.236447Z'} -
New CVE Received by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added Description Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient validation and missing safety mechanisms such as cycle detection, recursion limits, or defensive handling of unexpected states when processing untrusted repository data and filesystem structures. This issue has been patched in versions 5.9.0 and 6.0.0-alpha.1. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-674 Added CWE CWE-835 Added Reference https://github.com/go-git/go-billy/releases/tag/v5.9.0 Added Reference https://github.com/go-git/go-billy/releases/tag/v6.0.0-alpha.1 Added Reference https://github.com/go-git/go-billy/security/advisories/GHSA-m3xc-h892-ggx6