{"id":"CVE-2026-112269","title":"SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations","summary":"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 w…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-770"],"vendor":"sgl-project","product":"sglang","affected":["sglang <= 0.5.22"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T13:55:17.954Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112269","references":[{"url":"https://github.com/sgl-project/sglang/issues/45012"},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L2885-L2935"},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L889-L909"},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/utils.py#L47-L69"},{"url":"https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauthenticated-mooncake-decode-registrations","label":"VulnCheck Advisory: SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T14:30:01.074Z","slug":"CVE-2026-112269","body":"## Overview\n\nSGLang 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.\n\n## Affected\n\n- `sglang <= 0.5.22`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}