CVE-2026-112269
CVE-2026-112269 · SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations
This page contains facts from public vulnerability sources. Check the original advisory before updating.
SGLang through 0.5.22 with the Mooncake disaggregation backend accepts unauthenticated decode registration messages on the Prefill rank ZMQ PULL socket, allowing denial of service. Network-adjacent attackers can send many registrations with unique mooncake_session_id values and large nested-buffer frames to exhaust Prefill memory until the scheduler is OOM-killed.
CVSS 7.1 · High · EPSS 0.5%
- Published
- Updated
Affected products and versions
sglang
- Versions
- ≥ 0, ≤ 0.5.22: Affected (semver)
No fix published
Original sources
- https://github.com/sgl-project/sglang/issues/45012
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L2885-L2935
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L889-L909
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/utils.py#L47-L69
- https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauthenticated-mooncake-decode-registrations
- https://nvd.nist.gov/vuln/detail/CVE-2026-112269