CVE-2026-31945 | danny-avila LibreChat up to 0.8.2/0.8.2-rc2/0.8.3-rc1 DNS Resolution server-side request forgery (GHSA-rgjq-4q58-m3q8)

VDB-354045 · CVE-2026-31945 · GHSA-RGJQ-4Q58-M3Q8 DANNY-AVILA LIBRECHAT UP TO 0.8.2/0.8.2-RC2/0.8.3-RC1 DNS RESOLUTION SERVER-SIDE REQUEST FORGERY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.8 $0-$5k 2.11 Summaryinfo A vulnerability classified as critical has been found in danny-avila LibreChat up to 0.8.2/0.8.2-rc2/0.8.3-rc1. Affected is an unknown function of the component DNS Resolution Handler. Performing a manipulation results in server-side request forgery. This vulnerability is known as CVE-2026-31945. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, was found in danny-avila LibreChat up to 0.8.2/0.8.2-rc2/0.8.3-rc1. This affects some unknown processing of the component DNS Resolution Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: LibreChat is a ChatGPT clone with additional features. Versions 0.8.2-rc2 through 0.8.2 are vulnerable to a server-side request forgery (SSRF) attack when using agent actions or MCP. Although a previous SSRF vulnerability (https://github.com/danny-avila/LibreChat/security/advisories/GHSA-rgjq-4q58-m3q8) was reported and patched, the fix only introduced hostname validation. It does not verify whether DNS resolution results in a private IP address. As a result, an attacker can still bypass the protection and gain access to internal resources, such as an internal RAG API or cloud instance metadata endpoints. Version 0.8.3-rc1 contains a patch. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-31945 since 03/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. Upgrading to version 0.8.3-rc1 eliminates this vulnerability. Productinfo Type Chat Software Vendor danny-avila Name LibreChat Version 0.8.0 0.8.1 0.8.2 0.8.2-rc1 0.8.2-rc2 0.8.3-rc1 Website Product: https://github.com/danny-avila/LibreChat/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.0 VulDB Meta Temp Score: 6.8 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.7 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Server-side request forgery CWE: CWE-918 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: LibreChat 0.8.3-rc1 Timelineinfo 03/10/2026 CVE reserved 03/27/2026 +17 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-rgjq-4q58-m3q8 Status: Confirmed CVE: CVE-2026-31945 (🔒) GCVE (CVE): GCVE-0-2026-31945 GCVE (VulDB): GCVE-100-354045 Entryinfo Created: 03/27/2026 23:48 Changes: 03/27/2026 23:48 (66) Complete: 🔍 Cache ID: 99:834:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸