CVE-2026-58203
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
A vulnerability in pydantic-settings versions 2.12.0 through 2.14.1 allows reading files outside the configured secrets_dir by following symbolic links. The secrets_dir_max_size protection is also bypassed, enabling unrestricted file reads.
Risk Assessment
An attacker or lower-privileged component able to influence entries in the secrets directory (e.g., a writable or shared mount) can read arbitrary local files into settings, leading to sensitive data exposure.
Recommendation
Immediately upgrade pydantic-settings to version 2.14.2 or later. As a workaround, disable secrets_nested_subdir and restrict access to the secrets_dir.
Original NVD description (English source)
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.