{"id":"PYSEC-2026-3480","summary":"LMCache: 16-bit multimodal hash collision can poison KV cache entries","details":"A flaw has been found in LMCache up to 0.4.6. This affects the function hex_hash_to_int16 of the file lmcache/integration/vllm/utils.py of the component KV Cache Handler. Executing a manipulation can lead to use of weak hash. The attack needs to be launched locally. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.","aliases":["CVE-2026-10813","GHSA-3hh9-752g-5g22"],"modified":"2026-07-23T15:00:13.750119453Z","published":"2026-07-23T11:41:38.726472Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-10813"},{"type":"WEB","url":"https://github.com/LMCache/LMCache/issues/3301"},{"type":"WEB","url":"https://github.com/LMCache/LMCache/pull/2932"},{"type":"PACKAGE","url":"https://github.com/LMCache/LMCache"},{"type":"WEB","url":"https://vuldb.com/cve/CVE-2026-10813"},{"type":"WEB","url":"https://vuldb.com/submit/831641"},{"type":"WEB","url":"https://vuldb.com/vuln/368261"},{"type":"WEB","url":"https://vuldb.com/vuln/368261/cti"},{"type":"PACKAGE","url":"https://pypi.org/project/lmcache"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-3hh9-752g-5g22"}],"affected":[{"package":{"name":"lmcache","ecosystem":"PyPI","purl":"pkg:pypi/lmcache"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.4.6"}]}],"versions":["0.3.0","0.3.1","0.3.1.post1","0.3.10","0.3.10.post1","0.3.10.post2","0.3.11","0.3.12","0.3.13","0.3.14","0.3.15","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.3.9","0.3.9.post1","0.3.9.post2","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.6"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/lmcache/PYSEC-2026-3480.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"}]}