{"id":"CVE-2026-112269","state":"PUBLISHED","title":"SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations","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.","publishedAt":"2026-10-19T13:55:17.954Z","updatedAt":"2026-10-19T18:06:43.345Z","severity":{"score":7.1,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["sgl-project sglang"],"affected":[{"vendor":"sgl-project","product":"sglang","packageURL":"pkg:pypi/sglang","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.5.22","versionType":"semver"}],"repo":"https://github.com/sgl-project/sglang"}],"references":["https://github.com/sgl-project/sglang/issues/45012","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/blob/v0.5.22/python/sglang/srt/disaggregation/common/utils.py#L47-L69","https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauthenticated-mooncake-decode-registrations"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/112xxx/CVE-2026-112269.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112269","state":"PUBLISHED","datePublished":"2026-10-19T13:55:17.954Z","dateUpdated":"2026-10-19T18:06:43.345Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-19T13:25:26.990Z"},"containers":{"cna":{"title":"SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations","descriptions":[{"lang":"en","value":"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. 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