Path Traversal in Pydantic
CVE-2026-58203
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (7.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Pydantic
- Pydantic Pydantic-Settings — versions >= 2.12.0, < 2.14.2
Weakness classification (CWE)
References
- github.com/pydantic/pydantic-settings/security/advisories/GHSA-4xgf-cpjx-pc3j (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-58203?
- CVE-2026-58203 is a medium-severity vulnerability in Pydantic, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-07-06.
- How severe is CVE-2026-58203?
- Medium severity. CVSS v3 base score is 5.3 out of 10.