CVE-2022-41720

On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS("") has changed. Previously, an empty root was treated equivalently to "/", so os.DirFS("").Open("tmp") would open the path "/tmp". This now returns an error.

• CWE-22

• https://go.dev/cl/455716Patch, Vendor Advisory
• https://go.dev/issue/56694Issue Tracking, Vendor Advisory
• https://groups.google.com/g/golang-announce/c/L_3rmdT0BMU/m/yZDrXjIiBQAJPatch, Release Notes, Third Party Advisory
• https://pkg.go.dev/vuln/GO-2022-1143Patch, Vendor Advisory
• https://go.dev/cl/455716Patch, Vendor Advisory
• https://go.dev/issue/56694Issue Tracking, Vendor Advisory
• https://groups.google.com/g/golang-announce/c/L_3rmdT0BMU/m/yZDrXjIiBQAJPatch, Release Notes, Third Party Advisory
• https://pkg.go.dev/vuln/GO-2022-1143Patch, Vendor Advisory

Published

Dec 7, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2022-41715Programs which compile regular expressions from untrusted so…7.5
• CVE-2022-41716Due to unsanitized NUL values, attackers may be able to mali…7.5
• CVE-2022-41717An attacker can cause excessive memory growth in a Go server…5.3
• CVE-2022-41718Rejected reason: reserved but not needed
• CVE-2022-41719Unmarshal can panic on some inputs, possibly allowing for de…7.5
• CVE-2022-4172An integer overflow and buffer overflow issues were found in…6.5
• CVE-2022-41721A request smuggling attack is possible when using MaxBytesHa…7.5
• CVE-2022-41722A path traversal vulnerability exists in filepath.Clean on W…7.5
• CVE-2022-41723A maliciously crafted HTTP/2 stream could cause excessive CP…7.5
• CVE-2022-41724Large handshake records may cause panics in crypto/tls. Both…7.5
• CVE-2022-41725A denial of service is possible from excessive resource cons…7.5
• CVE-2022-41726Rejected reason: reserved but not needed