CVE-2026-59819: LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format

Q: How do I fix CVE-2026-59819?

litellm: upgrade to 1.83.10. Exact commands for each OS are on this page.

Q: Is CVE-2026-59819 being exploited?

CVE-2026-59819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59819 affect?

CVE-2026-59819 affects litellm. Severity is medium (CVSS 4.9). 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, allo

Q: How urgent is CVE-2026-59819?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 4.9UPGRADE

CVE-2026-59819 is a medium-severity flaw (CVSS 4.9) affecting litellm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-stab

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-73
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: litellm

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 20:16 UTCPublished CVE record published
2026-10-25 17:10 UTCUpdated Record last modified

litellm litellm UPGRADE

Affected: < 1.83.10 · 1.83.10 nightly

Fixed in: 1.83.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy litellm || rpm -q litellm || litellm --version

2. UPGRADE to 1.83.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade litellm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade litellm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59819?

litellm: upgrade to 1.83.10. Exact commands for each OS are on this page.

Is CVE-2026-59819 being exploited?

CVE-2026-59819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59819 affect?

CVE-2026-59819 affects litellm. Severity is medium (CVSS 4.9). 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, allo

How urgent is CVE-2026-59819?

Priority 29/100. No elevated risk signals yet.

Software pages

OpenAI and LLM tools vulnerabilities

Related CVEs

CVE-2026-59822 HIGH 8.2 EXPLOITED UPGRADE BerriAI LiteLLM Improper Authentication Vulnerability
CVE-2026-59821 HIGH 7.2 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-59820 MEDIUM 6.5 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-35030 CRITICAL 9.1 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format
CVE-2026-35029 HIGH 8.8 UPGRADE LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format

References

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