| Name | CVE-2026-56857 |
| Description | On Windows, when the target of Root.Mkdir or Root.MkdirAll is a junction pointing to an empty location, the operation can create a directory at the junction target even when that target is located outside the root. This only applies to operations where the last path component is a junction (path/to/junction, but not path/junction/target). |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| golang-1.19 (PTS) | bookworm | 1.19.8-2 | fixed |
| golang-1.24 (PTS) | trixie | 1.24.4-1 | fixed |
| golang-1.26 (PTS) | forky, sid | 1.26.10-1 | fixed |
| golang-1.27 (PTS) | forky, sid | 1.27.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| golang-1.19 | source | (unstable) | (not affected) | |||
| golang-1.24 | source | (unstable) | (not affected) | |||
| golang-1.25 | source | (unstable) | (not affected) | |||
| golang-1.26 | source | (unstable) | (not affected) | |||
| golang-1.27 | source | (unstable) | (not affected) |
- golang-1.27 <not-affected> (Only affects Go on Windows)
- golang-1.26 <not-affected> (Only affects Go on Windows)
- golang-1.25 <not-affected> (Only affects Go on Windows)
- golang-1.24 <not-affected> (Only affects Go on Windows)
- golang-1.19 <not-affected> (Only affects Go on Windows)
https://www.openwall.com/lists/oss-security/2026/10/08/9
https://github.com/golang/go/issues/81739