UBUNTU-CVE-2026-58203

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Source

https://ubuntu.com/security/CVE-2026-58203

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58203.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-58203

Upstream

CVE-2026-58203

Published

2026-07-06T16:16:00Z

Modified

2026-07-09T17:17:12Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

pydantic-settings provides settings management using Pydantic. From 2.12.0 until 2.14.2, NestedSecretsSettingsSource reads secret values from files in a configured secrets_dir. When secrets_nested_subdir=True, a directory entry inside secrets_dir that is a symbolic link pointing outside secrets_dir is followed, so files outside the configured directory are read into settings values. The same code path bypasses the documented secrets_dir_max_size protection. An attacker or lower-privileged component able to influence entries in the configured secrets directory (for example, a writable or shared secrets mount) can turn this into an unintended local file read into settings and can defeat the advertised loading-size cap. This vulnerability is fixed in 2.14.2.

References

Affected packages

Ubuntu:25.10 / pydantic-settings

Package

Name: pydantic-settings
Purl: pkg:deb/ubuntu/pydantic-settings?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.8.1-1

2.8.1-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "python3-pydantic-settings",
            "binary_version": "2.8.1-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58203.json"

Ubuntu:26.04:LTS / pydantic-settings