Resource exhaustion in Sgl-Project Sglang
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/sgl-project/sglang/issues/45012 (issue-tracking)
- github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/moo… (technical-description)
- github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/moo… (technical-description)
- github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/com… (technical-description)
- www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauth… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112269?
- CVE-2026-112269 is a medium-severity vulnerability in Sgl-Project Sglang, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-10-19.
- How severe is CVE-2026-112269?
- Medium severity. CVSS v3 base score is 6.5 out of 10.