os.OpenFile(path, os.O_CREATE|O_EXCL) behaved differently on Unix and Windows systems when the target path was a dangling symlink. On Unix systems, OpenFile with O_CREATE and O_EXCL flags never follows symlinks. On Windows, when the target path was a symlink to a nonexistent location, OpenFile would create a file in that location. OpenFile now always returns an error when the O_CREATE and O_EXCL flags are both set and the target path is a symlink.
https://pkg.go.dev/vuln/GO-2025-3750
Published: 2025-06-11
Updated: 2025-08-08
Named Vulnerability: GO-2025-3750Named Vulnerability: GHSA-jw54-c8rr-pjpq
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:C/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Severity: Medium
EPSS: 0.00314