go-git go-billy up to 5.8.x recursion

Summaryinfo

A vulnerability, which was classified as problematic, has been found in go-git go-billy up to 5.8.x. This affects an unknown function. Performing a manipulation results in recursion. This vulnerability was named CVE-2026-44740. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in go-git go-billy up to 5.8.x. It has been classified as problematic. This affects an unknown functionality. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-44740 since 05/07/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 321461 (openSUSE 16 Security Update : trivy (openSUSE-SU-2026:20956-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.9.0 or 6.0.0-alpha.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (321461). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Versioning Software

Vendor

• go-git

Name

• go-billy

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8

Website

• Product: https://github.com/go-git/go-billy/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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