CVE-2026-109226

HIGH 7.5

SGLang through 0.5.21 Audio Decompression Amplification via load_audio

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-409
Vendor	sgl-project
Product	sglang
Published	Oct 12, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

sgl-project / sglang

0 ≤ 0.5.21

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/sgl-project/sglang/issues/43708 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1783 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1801-L1803 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/audio_from_video.py#L128 github.com: https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/base_processor.py#L996 github.com: https://github.com/sgl-project/sglang vulncheck.com: https://www.vulncheck.com/advisories/sglang-through-0.5.21-audio-decompression-amplification-via-load-audio

Credits

Jiapeng Li Jiajia Liu Jiadai Wang