{"cve_id":"CVE-2026-111497","published":"2026-10-22T14:17:37.190000+00:00","last_modified":"2026-10-30T20:30:11.670000+00:00","vuln_status":"Analyzed","description":"A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.\n\n\n\n\n\nUsers need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-252","CWE-787"],"in_kev":true,"kev_date_added":"2026-10-27","kev_ransomware":false,"epss_score":0.82641,"epss_percentile":0.99666,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-31T03:17:14.446276+00:00","first_seen":"2026-10-28T03:56:22.594683+00:00","kev_first_seen":"2026-10-28T03:57:14.037332+00:00","novelty_score":93.08,"novelty_reasons":["NEW","KEV_ADDED","SCORE_CHANGED","EPSS_SPIKE","HIGH_LEVERAGE_STEPPING_STONE","REACHES_TERMINAL","RAISES_REACH_COMMON_PRODUCT"],"novelty_at":"2026-11-02T03:21:44.260683+00:00","vendors":["7-zip","andybalholm","anthropic","apache","clickhouse","debian","duckdb","envoyproxy","google","istio","mcmilk","microsoft","nodejs","python-hyper","siemens","tianocore"],"products":[".net","7-zip-zstd","arrow","brotli","brotlicffi","bun","clickhouse","common_configurator","data_flow_monitoring","debian_linux","duckdb","edge_opc_ua_server_configurator","edk2","envoy","flow_creator_configurator","industrial_edge_cloud_connector_configurator","industrial_edge_databus_configurator","industrial_edge_hub","industrial_edge_management_cloud","istio","node.js","p7zip","ruggedcom_ape1808","ruggedcom_ape1808_firmware","woff2"],"affected":[{"vendor":"7-zip","product":"p7zip","ranges":["≤ 16.02"]},{"vendor":"andybalholm","product":"brotli","ranges":["< 1.2.7"]},{"vendor":"anthropic","product":"bun","ranges":["< 1.4.4"]},{"vendor":"apache","product":"arrow","ranges":["27.0.0","≤ 26.0.0"]},{"vendor":"clickhouse","product":"clickhouse","ranges":["≤ 26.10.2.103"]},{"vendor":"debian","product":"debian_linux","ranges":["12.0"]},{"vendor":"duckdb","product":"duckdb","ranges":["≤ 2.0.0"]},{"vendor":"envoyproxy","product":"envoy","ranges":["≥ 1.39.0 and < 1.39.3","≥ 1.38.0 and < 1.38.6","< 1.37.8"]},{"vendor":"google","product":"brotli","ranges":["≥ 1.2.0 and < 1.2.1","≥ 1.0.3 and < 1.0.10","≥ 1.1.0 and < 1.1.1"]},{"vendor":"google","product":"woff2","ranges":["all versions"]},{"vendor":"istio","product":"istio","ranges":["≥ 1.30.0 and < 1.30.6","< 1.29.9","≥ 1.31.0 and < 1.31.2"]},{"vendor":"mcmilk","product":"7-zip-zstd","ranges":["≤ 26.02-1.5.7-r2"]},{"vendor":"microsoft","product":".net","ranges":["11.0.0","≥ 8.0.0 and < 8.0.33","≥ 10.0.0 and < 10.0.14","≥ 9.0.0 and < 9.0.22"]},{"vendor":"nodejs","product":"node.js","ranges":["≥ 23.0.0 and < 24.22.1","< 22.23.4","≥ 25.0.0 and < 26.12.1"]},{"vendor":"python-hyper","product":"brotlicffi","ranges":["< 1.2.1.0"]},{"vendor":"siemens","product":"common_configurator","ranges":["all versions"]},{"vendor":"siemens","product":"data_flow_monitoring","ranges":["all versions"]},{"vendor":"siemens","product":"edge_opc_ua_server_configurator","ranges":["all versions"]},{"vendor":"siemens","product":"flow_creator_configurator","ranges":["all versions"]},{"vendor":"siemens","product":"industrial_edge_cloud_connector_configurator","ranges":["all versions"]},{"vendor":"siemens","product":"industrial_edge_databus_configurator","ranges":["all versions"]},{"vendor":"siemens","product":"industrial_edge_hub","ranges":["all versions"]},{"vendor":"siemens","product":"industrial_edge_management_cloud","ranges":["all versions"]},{"vendor":"siemens","product":"ruggedcom_ape1808_firmware","ranges":["all versions"]},{"vendor":"tianocore","product":"edk2","ranges":["≤ 202608"]}]}