{"id":"CVE-2026-92972","title":"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","summary":"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 ra…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","cwe":["CWE-306"],"vendor":"sgl-project","product":"sglang","affected":["sglang <= 0.5.19"],"published":"2026-09-17","updated":"2026-09-22","sourceUpdated":"2026-09-22T20:43:58.793","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92972","references":[{"url":"https://github.com/sgl-project/sglang","label":"disclosure@vulncheck.com"},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/common/conn.py#L1716-L1718","label":"disclosure@vulncheck.com"},{"url":"https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/common/conn.py#L1736-L1810","label":"disclosure@vulncheck.com"},{"url":"https://github.com/sgl-project/sglang/issues/39400","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/sglang-through-0.5.19-unauthenticated-route-poisoning-via-put-endpoint","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00332,"epssPercentile":0.26583,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T19:15:50.626497Z"},"ingestedAt":"2026-09-17T14:19:30.994Z","slug":"CVE-2026-92972","body":"## Overview\n\nSGLang 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}