sgl-project SGLang up to 0.5.22 Mooncake disaggregation backend denial of service

Summaryinfo

A vulnerability classified as problematic has been found in sgl-project SGLang up to 0.5.22. Affected by this issue is some unknown functionality of the component Mooncake disaggregation backend. Performing a manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-112269. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in sgl-project SGLang up to 0.5.22. This affects some unknown processing of the component Mooncake disaggregation backend. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-112269 since 10/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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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