{"id":"CVE-2026-111392","summary":"SGLang through 0.5.21 KV Cache Poisoning via mm_hashes in /generate","details":"SGLang through 0.5.21 trusts caller-supplied mm_hashes values as the multimodal prefix-cache key, allowing remote attackers to poison cached KV entries across requests. Attackers can send a different image under a known or predicted hash via /generate to disclose another request's image content or corrupt victims' responses.","modified":"2026-10-21T02:55:10.717637259Z","published":"2026-10-16T17:38:44.867Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-345"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111392.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111392.json"},{"type":"PACKAGE","url":"https://github.com/sgl-project/sglang"},{"type":"ARTICLE","url":"https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/io_struct.py#L205-L215"},{"type":"ARTICLE","url":"https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/managers/tokenizer_manager.py#L1183-L1215"},{"type":"REPORT","url":"https://github.com/sgl-project/sglang/issues/44641"},{"type":"FIX","url":"https://github.com/sgl-project/sglang/pull/44653"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111392"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/sglang-through-0.5.21-kv-cache-poisoning-via-mm-hashes-in-generate"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sgl-project/sglang","events":[{"introduced":"28b095c01005d4a3a2a5b637b7d028b07fba31b2"},{"last_affected":"e00930c5489053f26d86b179cee0d087f846acbb"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0.5.13"},{"last_affected":"0.5.21"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111392.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}]}