Arbitrary file access via incomplete boundary checks
Published May 28, 2026 · Updated May 28, 2026
Path traversal in go-git go-billy before 5.9.0 allows remote authenticated users to read or write files outside intended directories. ChrootOS and chroot helper checks fail to reject additional parent-path variants, while iofs.Open applies OS-dependent cleaning to slash-separated paths. Exploitation requires an application to pass attacker-controlled paths to an affected filesystem implementation and rely on that implementation for isolation.
Summary
What happened
Path traversal in go-git go-billy before 5.9.0 allows remote authenticated users to read or write files outside intended directories. ChrootOS and chroot helper checks fail to reject additional parent-path variants, while iofs.Open applies OS-dependent cleaning to slash-separated paths. Exploitation requires an application to pass attacker-controlled paths to an affected filesystem implementation and rely on that implementation for isolation.
The record
- CVE
- CVE-2026-44973
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- go-git
- Product
- go-billy
- Classifications
- CWE-22, T1005, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 5.9.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo