VDB
CVE-2026-93688
CVE-2026-93688
PUBLISHED
CVSS 8.7 HIGH
Reported by VulnCheck · Published September 18, 2026
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.
Risk Scores
CVSS 4.0
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| sgl-project | sglang | 0 |
| sgl-project | sglang | 0 |
| lmsys | sglang |
Timeline
- Sep 18, 2026 Coalition ESS Score
- Sep 18, 2026 CVE Published
- Sep 19, 2026 EPSS Score
- Sep 22, 2026 CVE Updated
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
- Sep 30, 2026 EPSS Score
- Oct 2, 2026 EPSS Score
- Oct 6, 2026 EPSS Score
- Oct 8, 2026 EPSS Score
- Oct 11, 2026 EPSS Score
- Oct 14, 2026 EPSS Score
References
- GitHub Issue #39428 issue-tracking
- product
- technical-description
- technical-description
- technical-description
- technical-description
- VulnCheck Advisory: SGLang through 0.5.19 Unbounded Memory Allocation via bootstrap_room third-party-advisory