CVE-2026-59819: litellm — Fix

Description

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.10-stable, LiteLLM's /health/test_connection endpoint resolved request-supplied environment and OIDC file references in litellm_params, allowing a proxy administrator or another privileged caller with permission to test model connections to read files from the local filesystem via an oidc/file/ reference. This issue is fixed in version 1.83.10-stable.

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CVSS v3.1 Score

4.9

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0026

Probability of exploitation

0.17%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-73 CWE-73

Affected Products

Vendor	Product	Versions
litellm	litellm	< 1.83.10
litellm	litellm	All

References

Advisories & Patches

https://github.com/BerriAI/litellm/pull/25592 https://github.com/BerriAI/litellm/security/advisories/GHSA-4g5m-c9r5-49xf

Other References

https://github.com/BerriAI/litellm/releases/tag/v1.83.10-stable

Frequently Asked Questions

What is CVE-2026-59819? +

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.10-stable, LiteLLM's /health/test_connection endpoint resolved request-supplied environment and OIDC file references in litellm_params, allowing a proxy administrator or another privileged caller with permission to test model connections to read files from the local filesystem via an oidc/file/ reference. This issue is fixed in version 1.83.10-stable. It has a CVSS v3.1 base score of 4.9 (MEDIUM).

How severe is CVE-2026-59819? +

CVE-2026-59819 has a CVSS v3.1 score of 4.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0026, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-59819? +

CVE-2026-59819 affects products from litellm, specifically: litellm. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-59819? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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