{"id":"CVE-2026-26210","summary":"KTransformers Unsafe Deserialization RCE via balance_serve","details":"KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can send a crafted pickle payload to the exposed ZMQ socket to execute arbitrary code on the server with the privileges of the ktransformers process.","modified":"2026-07-16T03:31:09.309985945Z","published":"2026-04-23T21:24:48.641Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26210.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-502"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26210.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26210"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve"},{"type":"REPORT","url":"https://github.com/kvcache-ai/ktransformers/pull/1944"},{"type":"PACKAGE","url":"https://github.com/kvcache-ai/ktransformers"},{"type":"EVIDENCE","url":"https://chocapikk.com/posts/2026/ktransformers-pickle-rce/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kvcache-ai/ktransformers","events":[{"introduced":"0"},{"last_affected":"db9326302babfdc408dfd454d06aeecdbb91ea9a"}],"database_specific":{"cpe":"cpe:2.3:a:kvcache-ai:ktransformers:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.5.3"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["v0.5.3","v0.5.2.post1","v0.5.1","v0.5.0.post1","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.3.2","v0.3.1","v0.3","v0.2.4post1","v0.2.4","v0.2.3post2","v0.2.3post1","v0.2.3","v0.2.2","v0.2.2rc1","v0.2.1.post1","v0.2.1","v0.2.0","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26210.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}