CVE-2025-58758 is a medium-severity (CVSS 5.1) CWE-703 vulnerability in datahihi1/tiny-env. A fix is available for datahihi1/tiny-env — see the affected versions and patch details below.
TinyEnv: Missing .env file not required — may cause unexpected behavior
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-58758.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
datahihi1/tiny-env🐘datahihi1/tiny-envReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Impact
TinyEnv did not require the .env file to exist when loading environment variables.
This could lead to unexpected behavior where the application silently ignores missing configuration, potentially causing insecure defaults or deployment misconfigurations.
Affected versions:
- 1.0.1 → 1.0.2
- 1.0.9 → 1.0.10
Patches
The issue has been fixed in version 1.0.11.
All users should upgrade to 1.0.11 or later.
Workarounds
As a workaround, users can manually verify the existence of the .env file before initializing TinyEnv, for example:
if (!file_exists(__DIR__ . '/.env')) {
throw new RuntimeException('.env file is missing!');
}
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | datahihi1/tiny-env | all versions | 1.0.3composer require datahihi1/tiny-env:^1.0.3 |
| 🐘Packagist | datahihi1/tiny-env | ≥ 1.0.9&&< 1.0.11 | 1.0.11composer require datahihi1/tiny-env:^1.0.11 |
Affected Products
tinyenvdatahihi1Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for datahihi1/tiny-env, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update datahihi1/tiny-env to 1.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-58758 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2025-58758 in your dependencies?
Find it across Packagist, including transitive dependencies.