Read the docs
TI-2026-44986 Aliases CVE-2026-62960

Git for Windows: Server-advertised bundle-uri can trigger outbound SMB callbacks via UNC and file:// paths on Windows

Priority HIGH 66CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

Git for Windows is the Windows port of Git. Prior to 2.55.0.windows.4, a malicious remote Git server can advertise a bundle URI that reaches transport_get_remote_bundle_uri(), fetch_bundle_uri_internal(), and copy_uri_to_file() in bundle-uri.c during clone or fetch when transfer.bundleuri=true. Non-HTTP(S) values are treated as local filesystem paths, and file URI prefixes are removed, so a bare UNC path or file URI targeting an attacker-controlled share causes Windows to initiate an outbound SMB connection. This can expose NTLM authentication material to the attacker-selected host. This issue is fixed in version 2.55.0.windows.4.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00457 39th percentileScored 2026-11-07
Fix Fixed git (git-for-windows): 2.55.0.windows.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
git-for-windowsgitbefore 2.55.0.windows.42.55.0.windows.4Patch availableCNA
  • git Vendorgit-for-windows Affected before 2.55.0.windows.4 Fixed in 2.55.0.windows.4 Patch available CNA

Remediation

  • Fix · CNA git (git-for-windows) Fixed in 2.55.0.windows.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-62960

References

Other 3

  • TI-2025-40849 Git for Windows leaks NTLM hash when cloning from an attacker-controlled server CVSS 3.1HIGH 7.4
  • TI-2018-07996 In Git before 2.13.7, 2.14.x before 2.14.4, 2.15.x before 2.15.2, 2.16.x before 2.16.4… CVSS 3.0HIGH 7.8
  • TI-2026-85080 Out-of-bounds write in Git for Windows credential helper CVSS 3.1MEDIUM 4.4
  • TI-2022-20294 Git clone remote code execution vulnerability in git-for-windows CVSS 3.1HIGH 8.6
  • TI-2023-09447 gitk can inadvertently call executables in the worktree CVSS 3.1HIGH 8.6
  • TI-2022-13057 Git for Windows' installer can be tricked into executing an untrusted binary CVSS 3.1HIGH 8.2
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences