CVE-2025-0913: go — Fix

Description

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-59 CWE-59

Affected Products

Vendor	Product	Versions
golang	go	< 1.23.10
golang	go	1.24.0 — 1.24.4
microsoft	windows	All

References

Advisories & Patches

https://pkg.go.dev/vuln/GO-2025-3750

Other References

https://go.dev/cl/672396 https://go.dev/issue/73702 https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A

Frequently Asked Questions

What is CVE-2025-0913? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-0913? +

CVE-2025-0913 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-0913? +

CVE-2025-0913 affects products from golang, microsoft, specifically: go, windows. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-0913? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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