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

2026-07-09T17:17:12.900655432Z

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 secretsdir. When secretsnestedsubdir=True, a directory entry inside secretsdir that is a symbolic link pointing outside secretsdir is followed, so files outside the configured directory are read into settings values. The same code path bypasses the documented secretsdirmaxsize 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

0Unknown 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