CVE-2025-5791: Users Users May Append `root` To Vulnerability

HIGH
Advisory Identifier: GHSA-m65q-v92h-cm7q
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CVSS 7.1
CWE-266
Published
Advisory Summary

CVE-2025-5791 is a HIGH (CVSS 7.1) users may append `root` to vulnerability (CWE-266: Incorrect Privilege Assignment) affecting Users libraries in the crates.io ecosystem. The issue involves users may append `root` to group listings. Remediation is available in the latest vendor maintenance releases.

CVE-2025-5791 at a Glance

CVE Identifier CVE-2025-5791
GHSA Identifier GHSA-m65q-v92h-cm7q
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-266: Incorrect Privilege Assignment
Affected Product Users
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2025-5791

To remediate this vulnerability, upgrade all affected Users dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

users fixed: Latest secure release 
Upgrade users to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for users

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-5791, inspect your project dependencies for Users:

inspect dependencies for users

Analyze the terminal output to locate any version of Users in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-266: Incorrect Privilege Assignment, where a product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor. In Users, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Affected versions append `root` to group listings, unless the correct listing has exactly 1024 groups. This affects both: - The supplementary groups of a user - The group access list of the current process If the caller uses this information for access control, this may lead to privilege escalation. This crate is not currently maintained, so a patched version is not available. Versions older than 0.8.0 do not contain the affected functions, so downgrading to them is a workaround. ## Recommended alternatives - [`uzers`](https://crates.io/crates/uzers) (an actively maintained fork of the `users` crate) - [`sysinfo`](https://crates.io/crates/sysinfo)

CVE-2025-5791 Affected Users Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
users
 crates.io
≥ 0.8.0
≤ 0.11.0

References

NVD — CVE-2025-5791 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-5791
Users Source Repository REPOSITORY
https://github.com/ogham/rust-users/issues/44
Users Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2025-5791
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2370001
Users Source Repository REPOSITORY
https://github.com/ogham/rust-users
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2025-0040.html

Frequently Asked Questions

What is CVE-2025-5791?
CVE-2025-5791 is a security vulnerability in Users involving users may append `root` to group listings under CWE-266: Incorrect Privilege Assignment.
Which Users versions are affected?
Affected versions include releases prior to current release patches across affected packages: users.
What version fixes CVE-2025-5791?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is users affected?
Yes, users is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-5791?
CVE-2025-5791 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2025-5791?
CVE-2025-5791 is classified under CWE-266: Incorrect Privilege Assignment (A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.).
How can I check crates.io dependencies for CVE-2025-5791?
Run the dependency tree command: 'inspect dependencies for users'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m65q-v92h-cm7q",
  "modified" : "2025-06-06T23:16:38Z",
  "published" : "2025-06-05T01:17:28Z",
  "aliases" : [ "CVE-2025-5791" ],
  "summary" : "users may append `root` to group listings",
  "details" : "Affected versions append `root` to group listings, unless the correct listing has exactly 1024 groups.\n\nThis affects both:\n\n- The supplementary groups of a user\n- The group access list of the current process\n\nIf the caller uses this information for access control, this may lead to privilege escalation.\n\nThis crate is not currently maintained, so a patched version is not available.\n\nVersions older than 0.8.0 do not contain the affected functions, so downgrading to them is a workaround.\n\n## Recommended alternatives\n- [`uzers`](https://crates.io/crates/uzers) (an actively maintained fork of the `users` crate)\n- [`sysinfo`](https://crates.io/crates/sysinfo)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "users"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.8.0"
      }, {
        "last_affected" : "0.11.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-5791"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ogham/rust-users/issues/44"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2025-5791"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2370001"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ogham/rust-users"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2025-0040.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-266" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-05T01:17:28Z",
    "nvd_published_at" : null
  }
}