---
id: CVE-2026-109226
title: >-
  SGLang through 0.5.21 contains a decompression amplification vulnerability in
  load_audio that allows remote attackers to exhaust memory by submitting highly
  compressed audio decoded without duration or sample limits
summary: >-
  SGLang through 0.5.21 contains a decompression amplification vulnerability in
  load_audio that allows remote attackers to exhaust memory by submitting highly
  compressed audio decoded without duration or sample limits. Attackers can
  supply…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
published: '2026-10-12'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T19:18:13.833'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109226'
references:
  - url: 'https://github.com/sgl-project/sglang'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/audio_from_video.py#L128
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/base_processor.py#L996
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1783
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1801-L1803
    label: disclosure@vulncheck.com
  - url: 'https://github.com/sgl-project/sglang/issues/43708'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sglang-through-0.5.21-audio-decompression-amplification-via-load-audio
    label: disclosure@vulncheck.com
  - url: 'https://github.com/sgl-project/sglang/issues/43708'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00555
epssPercentile: 0.4609
ingestedAt: '2026-10-12T14:50:34.121Z'
vendor: sgl-project
product: sglang
affected:
  - sglang <= 0.5.21
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-13T18:23:46.746453Z'
---

## Overview

SGLang through 0.5.21 contains a decompression amplification vulnerability in load_audio that allows remote attackers to exhaust memory by submitting highly compressed audio decoded without duration or sample limits. Attackers can supply small FLAC-encoded silence files through audio_url or audio_data inputs that expand into massive PCM buffers, exhausting worker memory and CPU for denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.