HOMEVULNERABILITIESCVE-2026-54033
MEDIUM

CVE-2026-54033

CWE-918Published: June 25, 2026· Updated: Jun 29, 2026

6.5
CVSS v3.1
EPSS:0.20%probability of exploitation in 30 daysPercentile:10.1th

Official Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, LibreChat allows users to configure custom OpenAI-compatible API endpoints by setting a baseURL. This URL is used to construct HTTP requests without any SSRF validation — no private IP check, no scheme restriction, no DNS pinning. An authenticated user can set baseURL to internal network addresses. This vulnerability is fixed in 0.8.4-rc1.

NVD Source

Technical Analysis

CVE-2026-54033 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

librechat1 product
librechat
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq
ADVISORYhttps://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhq

All References (2)

→
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhqExploit · Mitigation · Vendor Advisory
→
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gc9r-88c3-7qhqExploit · Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2026-54033
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-918
CISA KEVNo
EPSS (30d)0.20%
Affected1 vendor
PublishedJun 25, 2026

Related CVEs (CWE-918)

CVE-2026-47938
10.0
CVE-2026-32169
10.0
CVE-2026-32186
10.0
CVE-2026-2053
10.0
CVE-2026-32871
10.0
CVE-2026-26138
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-54033 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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