CVE-2025-58759: 
PHP vulnerability analysis and mitigation

CVE-2025-58759 affects TinyEnv, an environment variable loader for PHP applications. The vulnerability was discovered and disclosed on September 8, 2025, impacting versions 1.0.9 and 1.0.10. The issue stems from improper handling of inline comments in .env values, which could lead to unexpected behavior and potential security risks (GitHub Advisory).

The vulnerability is classified as CWE-20 (Improper Input Validation) with a CVSS v3.1 score of 5.1 (Medium severity). The CVSS vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, indicating local attack vector, low attack complexity, no privileges required, and no user interaction needed. The scope is unchanged, with low impact on confidentiality and integrity, and no impact on availability (GitHub Advisory, NVD).

The vulnerability can cause applications to expose logic errors, insecure defaults, or failed authentication due to variables containing unintended characters, including # symbols or comment text. This primarily affects applications that depend on strict environment values (GitHub Advisory).

The vulnerability has been patched in version 1.0.11, and users are advised to upgrade to this latest version. For those unable to update immediately, temporary workarounds include avoiding the use of inline comments in .env files or implementing manual sanitization of loaded values (GitHub Advisory).