CVE-2026-112269CWE-770denial-of-service

CVE-2026-112269

Medium · published October 19, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
41.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · 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
EPSS
0.00487 · 41.0th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-19T18:17Z
References (6)
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/utils.py#L47-L69 · [email protected]https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L2885-L2935 · [email protected]https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/mooncake/conn.py#L889-L909 · [email protected]https://github.com/sgl-project/sglang/issues/45012 · [email protected]https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-unauthenticated-mooncake-decode-registrations · [email protected]https://github.com/sgl-project/sglang/issues/45012 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 13:55Z
    SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations
    cvelistv5
  • 19 OCT 13:55Z
    SGLang through 0.5.22 Memory Exhaustion via Unauthenticated Mooncake Decode Registrations
    cvelistv5