SGLang through 0.5.21 contains an unbounded memory allocation vulnerability that allows unauthenticated remote attackers to exhaust memory by uploading oversized files to /v1/audio/transcriptions. Attackers can send concurrent large multipart uploads, which are fully read into memory before validation, to crash the HTTP/tokenizer worker and deny service.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-770"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109225.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "0.5.21"
},
{
"fixed": "0.5.21"
}
],
"source": [
"AFFECTED_FIELD",
"DESCRIPTION"
]
}