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CVE-2026-92972

SGLang through 0.5.19 Unauthenticated Route Poisoning via PUT endpoint

CVSS 4.0 8.8 HIGHCVSS 3.1 8.6 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-92972

Published

SGLang through 0.5.19 in prefill/decode disaggregation mode contains an unauthenticated PUT /route endpoint on the prefill bootstrap service that allows attackers to poison the KV transfer routing table. Attackers can supply arbitrary rank_ip and rank_port values to redirect decode workers to attacker-controlled endpoints, causing denial of service or disclosure of KV transfer metadata including session identifiers and tensor-parallel topology parameters.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-92972

Published

sglang

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "sgl-project",
                    "product": "sglang",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/sglang",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "0.5.19",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON