NVD / CVE Program· CNA GitHub_M

CVE-2026-31942: LibreChat has IDOR in API Keys Management that allows any authenticated user to overwrite other users' API keys

Noroxi assessment

Priority: Monitor (action score 28/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.20% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: danny-avila LibreChat 0.8.3-rc1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to danny-avila LibreChat 0.8.3-rc1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.7.6, an Insecure Direct Object Reference (IDOR) vulnerability exists in the API keys management endpoint (PUT /api/keys). Due to the use of the JavaScript object spread operator after setting the authenticated user's ID, any authenticated user can inject a userId parameter in the request body to overwrite any other user's API keys (e.g., OpenAI, Anthropic, Azure). This allows an attacker to replace a victim's API key configuration, potentially routing the victim's conversations through attacker-controlled keys or denying service by providing invalid keys. This is patched in version 0.8.3-rc1.

HighCVSS 7.1 · v3.1—No exploit Fix available

Broken access control (IDOR)

Published: Jun 2, 2026
Updated: Jul 22, 2026
EPSS: 0.2% · 10th percentile
CWE: CWE-862

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 7.1; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
librechat	librechat	cpe:2.3:a:librechat:librechat

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

librechat librechatbefore 0.8.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

danny-avila LibreChat
- < 0.8.3-rc1affected

Same product

librechat: all records

Other highest-scoring records for the same primary product.

CVE-2026-22252LibreChat MCP Stdio Remote Command Execution
40Plan
CVE-2026-32625LibreChat Exfiltrates Server Secrets via MCP Server URL Injection
39Monitor
CVE-2024-41704LibreChat through 0.7.4-rc1 does not validate the normalized pathnames of images.
39Monitor

Published before and after this one in the same product

← EarlierCVE-2026-31951Mar 27, 2026 · LibreChat's MCP Server Header Injection Enables OAuth Token Theft
22Monitor
← EarlierCVE-2026-34371Apr 7, 2026 · LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal
25Monitor
Later →CVE-2026-44653Jun 2, 2026 · LibreChat Shared MCP Server View Leaks Decrypted Admin Secrets
26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
danny-avila LibreChat	0.8.3-rc1 · description	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-5402723 days apartLibreChat: Image Upload Route Bypasses Agent Permission Check — Incomplete Fix for File Upload Authorization
26Monitor
CVE-2026-5402923 days apartLibreChat: IDOR in Message Deletion — Incomplete Fix for CVE-2024-41703 Leaves deleteMessages() Without User Filter
26Monitor
CVE-2024-10363439 days apartImproper Access Control in danny-avila/LibreChat
21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).