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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 5
- StatusReceived → DeferredNVD modified 2026-10-28 13:46
- Cpes-1 CPE criteria (now 0)NVD modified 2026-10-28 00:17
- StatusPublished → ReceivedNVD modified 2026-10-28 00:17
- CVSS5.3 (v4.0, 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) → 2.1 (v4.0, 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-28 00:17
- First seenCVSS 5.3 · jeremyckahnNVD modified 2026-10-27 23:15
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 8
- https://github.com/0xGenesi/CVE/blob/main/Chitchatter_SDK_postMessage_Identity_Key_Injection.md
- https://github.com/jeremyckahn/chitchatter/
- https://github.com/jeremyckahn/chitchatter/commit/e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688
- https://github.com/jeremyckahn/chitchatter/pull/635
- https://vuldb.com/cve/CVE-2026-118129
- https://vuldb.com/submit/1015027
- https://vuldb.com/vuln/427456
- https://vuldb.com/vuln/427456/cti