Medium severity6.5NVD Advisory· Published Oct 19, 2026· Updated Oct 19, 2026
CVE-2026-112270
CVE-2026-112270
Description
SGLang through 0.5.22 with the Mooncake disaggregation backend contains an uncontrolled memory allocation vulnerability in handle_staging_rsp() that lets unauthenticated network-adjacent attackers exhaust Prefill memory. Attackers can obtain the rank address from the /route endpoint and send STAGING_RSP messages with huge chunk_idx values under fresh room IDs, causing the scheduler to be OOM-killed.
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Affected products
1- Range: <=0.5.22
Patches
Vulnerability mechanics
References
4- github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/staging_handler.pynvd
- github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.pynvd
- github.com/sgl-project/sglang/issues/45014nvd
- www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-mooncake-staging-rsp-chunk-idxnvd
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