GHSA-hpqj-j2xw-q3cxHighCVSS 7.5
SGLang through 0.5.19 in prefill/decode disaggregation mode with Mooncake KV transfer backend...
🔗 CVE IDs covered (1)
📋 Description
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.
🔗 References (9)
- https://nvd.nist.gov/vuln/detail/CVE-2026-93688
- https://github.com/sgl-project/sglang/issues/39428
- https://github.com/sgl-project/sglang
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/mooncake/conn.py#L1988-L1990
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/mooncake/conn.py#L2118-L2119
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/io_struct.py#L281
- https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/scheduler.py#L2672-L2690
- https://www.vulncheck.com/advisories/sglang-through-0.5.19-unbounded-memory-allocation-via-bootstrap-room
- https://github.com/advisories/GHSA-hpqj-j2xw-q3cx