{"cve":"CVE-2026-6608","nvd":{"published":"2026-04-20T06:16:21.733","modified":"2026-10-26T21:10:00.170","status":"Deferred","description":"A vulnerability was detected in lm-sys fastchat up to 0.2.36. Impacted is the function add_text of the component Arena Side-by-Side View Handler. The manipulation results in incorrect control flow. The attack can be launched remotely. The exploit is now public and may be used. The root cause was fixed in commit 34eca62 for gradio_block_arena_named.py, but three other files were missed.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","score":5.5},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-670"],"references":["https://gist.github.com/YLChen-007/e45039d23e698222d887ee09735d9d36","https://github.com/lm-sys/FastChat/","https://github.com/lm-sys/FastChat/issues/3834","https://vuldb.com/submit/792228","https://vuldb.com/vuln/358243"],"products":[],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-6608","score":0.00308,"percentile":0.23364,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-f3q6-69f3-vwch","url":"https://osv.dev/vulnerability/GHSA-f3q6-69f3-vwch","summary":"FastChat has a Content Moderation Bypass via Arena Side-by-Side Views","modified":"2026-07-13T16:43:38.106457256Z","packages":[{"ecosystem":"PyPI","name":"fschat","purl":"pkg:pypi/fschat","ranges":["<=0.2.36"],"fixed":[]}]},{"id":"PYSEC-2026-2485","url":"https://osv.dev/vulnerability/PYSEC-2026-2485","summary":"FastChat has a Content Moderation Bypass via Arena Side-by-Side Views","modified":"2026-07-13T16:32:37.400687016Z","packages":[{"ecosystem":"PyPI","name":"fschat","purl":"pkg:pypi/fschat","ranges":["<=0.2.36"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}