CVE-2026-27139
FileInfo can escape from a Root in os
Description
On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root.
INFO
Published Date :
March 6, 2026, 10:16 p.m.
Last Modified :
March 9, 2026, 3:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update to a version that sanitizes directory paths.
- Sanitize all directory path inputs.
- Implement strict path validation.
- Restrict file access to the intended root.
Public PoC/Exploit Available at Github
CVE-2026-27139 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27139.
| URL | Resource |
|---|---|
| https://go.dev/cl/749480 | |
| https://go.dev/issue/77827 | |
| https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk | |
| https://pkg.go.dev/vuln/GO-2026-4602 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27139 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27139
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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Go Dockerfile Shell PowerShell HTML
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27139 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27139 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N -
New CVE Received by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Added Description On Unix platforms, when listing the contents of a directory using File.ReadDir or File.Readdir the returned FileInfo could reference a file outside of the Root in which the File was opened. The impact of this escape is limited to reading metadata provided by lstat from arbitrary locations on the filesystem without permitting reading or writing files outside the root. Added Reference https://go.dev/cl/749480 Added Reference https://go.dev/issue/77827 Added Reference https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk Added Reference https://pkg.go.dev/vuln/GO-2026-4602