{"id":"CVE-2026-118129","revision":"743cc55296ef49a3a13ae10d893fa626","records":[{"revision":"743cc55296ef49a3a13ae10d893fa626","observedAt":"2026-10-28T01:46:00.79+00:00","statement":{"source":"cve-program","id":"CVE-2026-118129","aliases":[],"title":"jeremyckahn Chitchatter PostMessage Bootstrap.tsx isConfigMessageEvent improper authentication","description":"A vulnerability was found in jeremyckahn Chitchatter up to f82538633813c854a81a8b2112a2f6ba17b39cbc. The affected element is the function isConfigMessageEvent of the file src/Bootstrap.tsx of the component PostMessage Handler. Performing a manipulation of the argument parentDomain results in improper authentication. Remote exploitation of the attack is possible. The exploit has been made public and could be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The patch is named e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688. It is recommended to apply a patch to fix this issue. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.","state":0,"publishedAt":"2026-10-27T23:15:19.571+00:00","modifiedAt":"2026-10-27T23:15:19.571+00:00","affected":[{"ecosystem":"Vendor product","name":"Chitchatter","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"jeremyckahn\",\n                    \"product\": \"Chitchatter\",\n                    \"versions\": [\n                        {\n                            \"version\": \"f82538633813c854a81a8b2112a2f6ba17b39cbc\",\n                            \"status\": \"affected\"\n                        }\n                    ],\n                    \"cpes\": [\n                        \"cpe:2.3:a:jeremyckahn:chitchatter:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"modules\": [\n                        \"PostMessage Handler\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 2.0","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C","score":7.5,"severity":null}],"references":["https://vuldb.com/vuln/427456","https://vuldb.com/vuln/427456/cti","https://vuldb.com/cve/CVE-2026-118129","https://vuldb.com/submit/1015027","https://github.com/0xGenesi/CVE/blob/main/Chitchatter_SDK_postMessage_Identity_Key_Injection.md","https://github.com/jeremyckahn/chitchatter/pull/635","https://github.com/jeremyckahn/chitchatter/commit/e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688","https://github.com/jeremyckahn/chitchatter/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118129","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118129","identifiers":["CVE-2026-118129"]},"retained":false,"historicalAffected":[]}],"coverage":[]}