Denial of Service Vulnerability in SGLang by SGL Project
CVE-2026-110809

5.3MEDIUM

Key Information:

Vendor

Sgl-project

Status
Sglang
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110809?

A vulnerability existing in the SGLang component SGLang Session Cleanup allows for remote denial of service attacks via the Session.create_req function, located in session_controller.py. This weakness can be exploited by an adversary to disrupt normal service availability, causing potential downtime. The issue was publicly disclosed and is awaiting resolution through an accepted pull request. Users of SGLang versions up to 0.5.19 are encouraged to take necessary precautions.

Affected Version(s)

SGLang 0.5.0

SGLang 0.5.1

SGLang 0.5.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-110809 - Proof of Concept

References

https://vuldb.com/vuln/420279
vdb-entrytechnical-description
https://vuldb.com/vuln/420279/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-110809
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zyz3366 (VulDB User)
VulDB CNA Team
.