118 lines
4.8 KiB
JSON
118 lines
4.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-31951",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-03-10T15:10:10.657Z",
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"datePublished": "2026-03-27T19:29:25.892Z",
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"dateUpdated": "2026-03-31T13:46:25.297Z"
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},
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"containers": {
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"cna": {
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"title": "LibreChat's MCP Server Header Injection Enables OAuth Token Theft",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-200",
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"lang": "en",
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"description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 6.8,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "NONE",
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"privilegesRequired": "LOW",
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"scope": "CHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-pmw7-gqwj-f954",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-pmw7-gqwj-f954"
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}
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],
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"affected": [
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{
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"vendor": "danny-avila",
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"product": "LibreChat",
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"versions": [
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{
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"version": ">= v0.8.2-rc1, <= v0.8.3-rc1",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-03-27T19:29:25.892Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc1 through 0.8.3-rc1, user-created MCP (Model Context Protocol) servers can include arbitrary HTTP headers that undergo credential placeholder substitution. An attacker can create a malicious MCP server with headers containing `{{LIBRECHAT_OPENID_ACCESS_TOKEN}}` (and others), causing victims who call tools on that server to have their OAuth tokens exfiltrated. Version 0.8.3-rc2 fixes the issue."
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}
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],
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"source": {
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"advisory": "GHSA-pmw7-gqwj-f954",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-03-31T13:45:16.896153Z",
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"id": "CVE-2026-31951",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-03-31T13:46:25.297Z"
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}
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}
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]
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}
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} |