Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M

CVE-2026-62960Git for Windows: Server-advertised bundle-uri can trigger outbound SMB callbacks via UNC and file:// paths on Windows

High 7.4

In plain English

A high-severity information exposure in git from git-for-windows. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.5%top 60.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
git-for-windows	git	< 2.55.0.windows.4

Weakness: CWE-200, CWE-610 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

References

https://github.com/git-for-windows/git/security/advisories/GHSA-xrpg-8j9v-v282 x_refsource_CONFIRM
https://github.com/git-for-windows/git/commit/a93524749d7806870fd2b4b00a3812da1d6e5f4a x_refsource_MISC
https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.4 x_refsource_MISC