CVE Explorer

CVE-2026-54030

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1235738de8163e3f6ddd43e741cda3213c2adc93a577f7082dacb29b1ebdf5e4

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"LibreChat","vendor":"danny-avila","versions":[{"status":"affected","version":"< 0.8.5"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:cc15369584881aedd311304a7fdb510bb08f1e758fe78c6d514dc275d381116e · sha256:60ae70e6bc81a725… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:cc15369584881aedd311304a7fdb510bb08f1e758fe78c6d514dc275d381116e · sha256:60ae70e6bc81a725… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cc15369584881aedd311304a7fdb510bb08f1e758fe78c6d514dc275d381116e · sha256:60ae70e6bc81a725… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["exploit"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cc15369584881aedd311304a7fdb510bb08f1e758fe78c6d514dc275d381116e · sha256:60ae70e6bc81a725… · /containers/adp/0/references/0

{"name":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23","tags":["x_refsource_CONFIRM"],"url":"https://github.com/danny-avila/LibreChat/security/advisories/GHSA-gvpj-vm2f-2m23"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cc15369584881aedd311304a7fdb510bb08f1e758fe78c6d514dc275d381116e · sha256:60ae70e6bc81a725… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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