CVE-2026-54030: LibreChat is an enhanced ChatGPT clone that supports multiple AI providers

Q: How do I fix CVE-2026-54030?

librechat: upgrade to newer than 0.8.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-54030 being exploited?

CVE-2026-54030 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-2026-54030 affect?

CVE-2026-54030 affects librechat. Severity is high (CVSS 8.0). LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the con

Q: How urgent is CVE-2026-54030?

Priority 34/100. High severity; Public exploit reference

Routine

HIGH 8.0UPGRADE

CVE-2026-54030 is a high-severity flaw (CVSS 8.0) affecting librechat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the configured MCP server URL, allowing a malicious MCP server to steal access tokens intended for a legitimate server. This vulnerability is fixed in 0.8.5.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-346
Published	2026-06-25
Last modified	2026-10-25

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

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

Am I affected?

Timeline

2026-06-25 17:16 UTCPublished CVE record published
2026-10-25 22:10 UTCUpdated Record last modified

librechat librechat UPGRADE

Affected: <= 0.8.4 · 0.8.5 rc1

Fixed in: newer than 0.8.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.8.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade librechat

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-2026-54030?

librechat: upgrade to newer than 0.8.4. Exact commands for each OS are on this page.

Is CVE-2026-54030 being exploited?

CVE-2026-54030 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-2026-54030 affect?

CVE-2026-54030 affects librechat. Severity is high (CVSS 8.0). LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata (RFC 9728) matches the con

How urgent is CVE-2026-54030?

Priority 34/100. High severity; Public exploit reference

Software pages

OpenAI ChatGPT vulnerabilities

Related CVEs

CVE-2026-54033 HIGH 7.7 UPGRADE LibreChat is an enhanced ChatGPT clone that supports multiple AI providers
CVE-2026-54037 MEDIUM 6.5 UPGRADE LibreChat is an enhanced ChatGPT clone that supports multiple AI providers
CVE-2026-54024 MEDIUM 6.5 UPGRADE LibreChat is an enhanced ChatGPT clone that supports multiple AI providers
CVE-2026-54027 MEDIUM 6.5 UPGRADE LibreChat is an enhanced ChatGPT clone that supports multiple AI providers
CVE-2026-54036 MEDIUM 5.3 UPGRADE LibreChat is an enhanced ChatGPT clone that supports multiple AI providers

References

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