CVE-2026-102634
highSGLang through 0.5.20 in prefill/decode disaggregation mode fails to validate duplicate bootstrap_room fields in /generate requests with Mooncake KV transfer b…
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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-09-29 17:17
Modified: 2026-09-29 18:17
NVD status: Deferred
Last synced 2 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/sgl-project/sglang disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/common... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/decode... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/disaggregation/moonca... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.20/python/sglang/srt/managers/io_struct.py... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/issues/40125 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/sglang-through-0.5.20-denial-of-service-via-duplicate... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/issues/40125 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗