{"id":"CVE-2026-102634","published":"2026-09-29T17:17:07.147","lastModified":"2026-09-29T18:17:09.033","description":"SGLang through 0.5.20 in prefill/decode disaggregation mode fails to validate duplicate bootstrap_room fields in /generate requests with Mooncake KV transfer backend. Unauthenticated attackers can send concurrent requests with identical bootstrap_room values to crash scheduler processes or hang other users' requests until transfer timeout.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-694"],"vendors":[],"products":[],"references":[{"url":"https://github.com/sgl-project/sglang","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/conn.py#L392-L393","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/decode.py#L942","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/mooncake/conn.py#L2760-L2764","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/managers/io_struct.py#L281","tags":[]},{"url":"https://github.com/sgl-project/sglang/issues/40125","tags":[]},{"url":"https://www.vulncheck.com/advisories/sglang-through-0.5.20-denial-of-service-via-duplicate-bootstrap-room","tags":[]},{"url":"https://github.com/sgl-project/sglang/issues/40125","tags":[]}],"exploitRefs":[{"url":"https://github.com/sgl-project/sglang","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/conn.py#L392-L393","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/decode.py#L942","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/mooncake/conn.py#L2760-L2764","tags":[]},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/managers/io_struct.py#L281","tags":[]},{"url":"https://github.com/sgl-project/sglang/issues/40125","tags":[]},{"url":"https://github.com/sgl-project/sglang/issues/40125","tags":[]}],"hasPoc":true,"ai":null}