CVE-2026-112267: Server-Side Request Forgery (SSRF) in sgl-project sglang
Description
CVE-2026-112267 is a server-side request forgery (SSRF) vulnerability in sglang versions up to 0.5.22. It affects the prefill/decode disaggregation mode, allowing unauthenticated attackers to make outbound requests by manipulating bootstrap_host and bootstrap_port fields. Exploitation can probe internal hosts and ports and block the shared scheduler loop, causing delays in inference requests. The vulnerability has a medium severity with a CVSS 4.0 score of 6.9.
CVSS v4.0
Score 6.9medium
Affected software
sgl-project
sglang
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SGLang versions up to 0.5.22 contain an SSRF vulnerability in the prefill/decode disaggregation mode. Attackers can send crafted requests to the Decode worker's /generate endpoint, using client-supplied bootstrap_host and bootstrap_port fields to trigger outbound requests. This can be used to probe internal network resources and block the scheduler loop, delaying other inference operations. The vulnerability requires no authentication and has a medium impact on availability and integrity.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make arbitrary outbound requests from the vulnerable server, potentially accessing internal network resources. Additionally, the attacker can block the shared scheduler loop, causing delays in processing legitimate inference requests, impacting service availability and performance.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the /generate endpoint and validate or sanitize client-supplied bootstrap_host and bootstrap_port fields to prevent SSRF exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-19T13:25:24.708Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad623792cdf04f6565c8806
Added to database: 10/19/2026, 14:04:41 UTC
Last enriched: 10/19/2026, 14:19:04 UTC
Last updated: 10/19/2026, 14:19:15 UTC
Views: 9
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