CVE-2026-112269

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/utils.py#L47-L69
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L2885-L2935
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L889-L909
https://github.com/sgl-project/sglang/issues/45012
https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauthenticated-mooncake-decode-registrations
https://github.com/sgl-project/sglang/issues/45012

Configurations

No configuration.

History

19 Oct 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/sgl-project/sglang/issues/45012 -~~	() https://github.com/sgl-project/sglang/issues/45012 -

19 Oct 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 14:17

Updated : 2026-10-19 19:17

NVD link : CVE-2026-112269

Mitre link : CVE-2026-112269

CVE.ORG link : CVE-2026-112269

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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