CVE-2025-58759
📋 TL;DR
TinyEnv versions 1.0.9-1.0.10 fail to properly strip inline comments from .env file values, causing environment variables to contain unintended characters like # symbols or comment text. This affects PHP applications using TinyEnv for environment variable loading, potentially leading to misconfiguration, logic errors, or authentication failures.
💻 Affected Systems
- TinyEnv
📦 What is this software?
Tinyenv by Datahihi1
⚠️ Risk & Real-World Impact
Worst Case
Authentication systems fail due to malformed credentials, application logic errors expose sensitive data, or security controls are bypassed due to incorrect configuration values.
Likely Case
Application misconfiguration causing functionality errors, failed authentication attempts, or unexpected application behavior due to malformed environment variables.
If Mitigated
Minor application errors or debugging issues that are quickly identified and corrected without security impact.
🎯 Exploit Status
Exploitation requires attacker ability to modify .env files or influence their content, plus application logic that's sensitive to exact environment variable values.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.11
Vendor Advisory: https://github.com/datahihi1/tiny-env/security/advisories/GHSA-72cm-7236-h43r
Restart Required: No
Instructions:
1. Update TinyEnv dependency to version 1.0.11 or later. 2. For Composer: Run 'composer update datahihi1/tiny-env'. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
Avoid inline comments in .env files
allRemove or avoid using inline comments (text after #) within environment variable values in .env files
Manual value sanitization
allImplement custom sanitization of loaded environment variables to strip comment characters
🧯 If You Can't Patch
- Implement input validation for environment variables in application code
- Monitor application logs for unexpected behavior related to environment variable values
🔍 How to Verify
Check if Vulnerable:
Check composer.json or package manager for TinyEnv version 1.0.9 or 1.0.10Check Version:
composer show datahihi1/tiny-env | grep versionVerify Fix Applied:
Verify TinyEnv version is 1.0.11 or later, and test .env files with inline comments to ensure values load correctly📡 Detection & Monitoring
Log Indicators:
- Authentication failures with malformed credentials
- Application errors related to environment variable parsing
- Unexpected application behavior after .env file changes
SIEM Query:
Search for application logs containing 'TinyEnv', 'env parsing error', or authentication failures with environment-variable-based credentials