CVE-2026-93688
highSGLang through 0.5.19 in prefill/decode disaggregation mode with Mooncake KV transfer backend fails to validate bootstrap_room values, allowing unbounded trans…
SGLang through 0.5.19 in prefill/decode disaggregation mode with Mooncake KV transfer backend fails to validate bootstrap_room values, allowing unbounded transfer state allocation. Unauthenticated attackers can reach the decode engine's POST /generate endpoint and submit arbitrary bootstrap_room values to exhaust prefill process memory until out-of-memory termination.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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/v0.5.19/python/sglang/srt/disaggregation/moonca... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/moonca... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/io_struct.py... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/scheduler.py... disclosure@vulncheck.com
- https://github.com/sgl-project/sglang/issues/39428 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/sglang-through-0.5.19-unbounded-memory-allocation-via... disclosure@vulncheck.com