Description
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.
Published: 2026-10-19
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 19 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 19 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Sgl-project
Sgl-project sglang
Vendors & Products Sgl-project
Sgl-project sglang

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Sgl-project Sglang
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T18:06:43.345Z

Reserved: 2026-10-19T13:25:26.990Z

Link: CVE-2026-112269

cve-icon Vulnrichment

Updated: 2026-10-19T18:06:33.708Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:04.467

Modified: 2026-10-19T19:17:27.590

Link: CVE-2026-112269

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T19:00:04Z

Weaknesses
  • CWE-770

    Allocation of Resources Without Limits or Throttling