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CVE-2026-109226— SGLang through 0.5.21 Audio Decompression Amplification via load_audio

Quick assessment

Affected

sgl-project sglang

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SGLang 0.5.21 及更早版本在函数中存在一个解压放大漏洞，远程攻击者可以通过提交没有时长或采样率限制的高压缩比音频，导致内存耗尽。攻击者可以通过或输入提供小型的 FLAC 编码静音文件，这些文件在解码后会扩展为巨大的 PCM 缓冲区，从而耗尽工作进程的内存和 CPU 资源，造成拒绝服务（DoS）攻击。

CVSS 7.5 · High EPSS 0.46% · P38 Updated Oct 14, 2026

Possible ATT&CK Techniques 2 AI

T1496 · Resource Hijacking T1498 · Network Denial of Service

Affected Version Matrix 1

Vendor	Product	Version Range	Status
sgl-project	sglang	`≤ 0.5.21`	affected

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Vulnerability Information

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Vulnerability Title

SGLang through 0.5.21 Audio Decompression Amplification via load_audio

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

对高度压缩数据的处理不恰当(数据放大攻击)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
sgl-project	sglang	0 ~ 0.5.21	-

II. Public POCs for CVE-2026-109226

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-109226

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Same Patch Batch · sgl-project · 2026-10-12 · 5 CVEs total

CVE-2026-109225	7.5 HIGH	SGLang through 0.5.21 Memory Exhaustion DoS via /v1/audio/transcriptions Upload
CVE-2026-109227	7.5 HIGH	SGLang through 0.5.21 Memory Exhaustion DoS via Qwen-VL Video Preprocessing
CVE-2026-109228	7.5 HIGH	SGLang through 0.5.21 Resource Budget Bypass via GLM-V Video Parameters
CVE-2026-109229	7.5 HIGH	SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor

IV. Related Vulnerabilities

Same product: sglang

Same vendor: sgl-project

Same weakness: CWE-409

V. Comments for CVE-2026-109226

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CVE-2026-109226— SGLang through 0.5.21 Audio Decompression Amplification via load_audio

Quick assessment

Possible ATT&CK Techniques 2 AI

Affected Version Matrix 1

I. Basic Information for CVE-2026-109226

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-109226

III. Intelligence Information for CVE-2026-109226

Vendor Advisories for CVE-2026-109226 (1)

Proof of Concept for CVE-2026-109226 (1)

Other References for CVE-2026-109226 (1)

Same Patch Batch · sgl-project · 2026-10-12 · 5 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-109226

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