{"schema":"threatline.record/2","record":{"id":"CVE-2026-102634","aliases":[],"summary":"SGLang through 0.5.20 Denial of Service via Duplicate bootstrap_room","details":"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.","categories":["Unclassified"],"product":"sglang","vendor":"sgl-project","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-102634","source_modified_at":"2026-09-29T17:33:09.537Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"sglang","vendor":"sgl-project","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"0.5.20"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00582,"percentile":0.4711,"score_date":"2026-10-23"},"published_at":"2026-09-29T16:04:17.381Z","modified_at":"2026-09-29T17:33:09.537Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-102634","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-29T17:33:09.537Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-102634","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/sgl-project/sglang/issues/40125","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common/conn.py#L392-L393","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/mooncake/conn.py#L2760-L2764","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/decode.py#L942","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/managers/io_struct.py#L281","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/sgl-project/sglang","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/sglang-through-0.5.20-denial-of-service-via-duplicate-bootstrap-room","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-29T17:33:03.800231Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-29T17:33:09.537Z","content_hash":"f8c43f71cae2414e670ec32b720f658ff762386a0963e4e812bfc8dc585f31aa"}}