Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck

CVE-2026-112270SGLang through 0.5.22 Memory Exhaustion via Mooncake STAGING_RSP chunk_idx

Medium 6.5

In plain English

A medium-severity resource allocation without limits in sglang from sgl-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 83.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
sgl-project	sglang	0 – through 0.5.22

Weakness: CWE-770 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/sgl-project/sglang/issues/45014 issue-tracking
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/staging_handler.py#L505-L548 technical-description
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L2885-L2935 technical-description
VulnCheck Advisory: SGLang through 0.5.22 Memory Exhaustion via Mooncake STAGING_RSP chunk_idx third-party-advisory