Credential disclosure via unchecked wincred buffer append
Published Jul 8, 2025 · Updated Nov 4, 2025
Buffer overflow in Git's wincred credential helper allows local users to access credential data through crafted helper input. The helper builds a Windows Credential Manager target key in a fixed 1,024-wide-character buffer and appends protocol, username, host, and path values with wcsncat() without first ensuring sufficient remaining capacity. Exploitation requires Windows, wincred use or direct invocation, and user interaction; the published impact is limited to confidentiality, with no integrity or availability loss.
Summary
What happened
Buffer overflow in Git's wincred credential helper allows local users to access credential data through crafted helper input. The helper builds a Windows Credential Manager target key in a fixed 1,024-wide-character buffer and appends protocol, username, host, and path values with wcsncat() without first ensuring sufficient remaining capacity. Exploitation requires Windows, wincred use or direct invocation, and user interaction; the published impact is limited to confidentiality, with no integrity or availability loss.
The record
- CVE
- CVE-2025-48386
- Published
- Jul 8, 2025
- Updated
- Nov 4, 2025
- Vendor
- Git
- Product
- Git
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 8, 2025CVE publishedPublication date reported by the CVE source.
- Nov 4, 2025Record 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=< 2.43.7
- Affected versionversion=>= 2.44.0-rc0, < 2.44.4
- Affected versionversion=>= 2.45.0-rc0, < 2.45.4
- Affected versionversion=>= 2.46.0-rc0, < 2.46.4
- Affected versionversion=>= 2.47.0-rc0, < 2.47.3
- Affected versionversion=>= 2.48.0-rc0, < 2.48.2
- Affected versionversion=>= 2.49.0-rc0, < 2.49.1
- Affected versionversion=>= 2.50.0-rc0, < 2.50.1
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