sgl-project SGLang up to 0.5.22 Mooncake disaggregation backend handle_staging_rsp chunk_idx allocation of resources

Summaryinfo

A vulnerability described as problematic has been identified in sgl-project SGLang up to 0.5.22. Affected by this vulnerability is the function handle_staging_rsp of the component Mooncake disaggregation backend. Such manipulation of the argument chunk_idx leads to allocation of resources. This vulnerability is listed as CVE-2026-112270. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in sgl-project SGLang up to 0.5.22. It has been rated as problematic. Affected by this issue is the function handle_staging_rsp of the component Mooncake disaggregation backend. The manipulation of the argument chunk_idx with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-112270 since 10/19/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Project Management Software

Vendor

• sgl-project

Name

• SGLang

Version

• 0.5.0
• 0.5.1
• 0.5.2
• 0.5.3
• 0.5.4
• 0.5.5
• 0.5.6
• 0.5.7
• 0.5.8
• 0.5.9
• 0.5.10
• 0.5.11
• 0.5.12
• 0.5.13
• 0.5.14
• 0.5.15
• 0.5.16
• 0.5.17
• 0.5.18
• 0.5.19
• 0.5.20
• 0.5.21
• 0.5.22

Website

• Product: https://github.com/sgl-project/sglang/

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