LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication attempts. A network attacker can submit password guesses at full request speed until a valid account password is found. Successful credential recovery grants authenticated access to documents, the knowledge graph, and administrative operations. This issue is fixed in version 1.5.5.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-307"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85734.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.5.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "135bc9056e9ecd800c1abe2f2ce24d1a86622a54"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v1.5.5",
"range": [
{
"fixed": "22ea2d0cbfa2b7002aa118bd0bf1780a69d489bc"
}
],
"source": "REFERENCES_TAG"
}
]
}