SGLang through 0.5.22 contains a denial of service vulnerability that allows API clients to abort other users' in-flight generation requests by supplying a short client-controlled rid. Attackers can submit streaming /generate requests with single hex character rids and disconnect, triggering prefix-matching abort logic that terminates all other clients' requests.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
sgl-project sglang unaffected
Version Status Constraints
0 affected ≤ 0.5.22

No data.

No data.

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Vendors Products
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Sglang Subscribe

Project Subscriptions

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Sglang Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/scheduler.py#L5458-L5590 cve-icon cve-icon
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/tokenizer_manager.py#L2240-L2256 cve-icon cve-icon
https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/tokenizer_manager.py#L2425-L2436 cve-icon cve-icon
https://github.com/sgl-project/sglang/issues/41474 cve-icon cve-icon cve-icon
https://github.com/sgl-project/sglang/issues/45002 cve-icon cve-icon
https://www.vulncheck.com/advisories/sglang-through-0.5.22-cross-request-abort-via-rid-prefix-matching cve-icon cve-icon
History

Mon, 19 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Sgl-project
Sgl-project sglang
Vendors & Products Sgl-project
Sgl-project sglang

Mon, 19 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description SGLang through 0.5.22 contains a denial of service vulnerability that allows API clients to abort other users' in-flight generation requests by supplying a short client-controlled rid. Attackers can submit streaming /generate requests with single hex character rids and disconnect, triggering prefix-matching abort logic that terminates all other clients' requests.
Title SGLang through 0.5.22 Cross-Request Abort via rid Prefix Matching
Weaknesses CWE-187
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T14:21:40.361Z

Reserved: 2026-10-19T13:25:24.402Z

Link: CVE-2026-112266

cve-icon Vulnrichment

Updated: 2026-10-19T14:21:36.066Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:03.987

Modified: 2026-10-19T15:17:05.480

Link: CVE-2026-112266

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T19:00:04Z

Weaknesses