CVE-2026-112270CWE-770denial-of-service

CVE-2026-112270

Medium · published October 19, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
15.3
In the wild
Unconfirmed
What it is

SGLang through 0.5.22 with the Mooncake disaggregation backend contains an uncontrolled memory allocation vulnerability in handle_staging_rsp() that lets unauthenticated network-adjacent attackers exhaust Prefill memory. Attackers can obtain the rank address from the /route endpoint and send STAGING_RSP messages with huge chunk_idx values under fresh room IDs, causing the scheduler to be 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
0.00249 · 15.3th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-19T18:17Z
References (4)
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/disaggregation/common/staging_handler.py#L505-L548 · [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/issues/45014 · [email protected]https://www.vulncheck.com/advisories/sglang-through-0.5.22-memory-exhaustion-via-mooncake-staging-rsp-chunk-idx · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 13:55Z
    SGLang through 0.5.22 Memory Exhaustion via Mooncake STAGING_RSP chunk_idx
    cvelistv5
  • 19 OCT 13:55Z
    SGLang through 0.5.22 Memory Exhaustion via Mooncake STAGING_RSP chunk_idx
    cvelistv5