Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109228SGLang through 0.5.21 Resource Budget Bypass via GLM-V Video Parameters

High 7.5

In plain English

A high-severity resource allocation without limits in sglang from sgl-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 57.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SGLang through 0.5.21 contains a resource budget bypass vulnerability that allows remote attackers to override GLM-V video processing limits by supplying fps, max_frames, max_tokens_per_frame and max_image_tokens in the video_url object. Attackers can set these values arbitrarily high so glm4v.py decodes every frame of high-resolution video at full size, exhausting worker memory and denying service.

Affected products (as reported)

Vendor	Product	Versions
sgl-project	sglang	0 – through 0.5.21

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Issue #43705 issue-tracking
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/entrypoints/openai/protocol.py#L592-L594 technical-description
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/parser/conversation.py#L691 technical-description
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/glm4v.py#L160-L167 technical-description
https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/glm4v.py#L400 technical-description
https://github.com/sgl-project/sglang product
VulnCheck Advisory: SGLang through 0.5.21 Resource Budget Bypass via GLM-V Video Parameters third-party-advisory