CVE-2026-118129

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.

CVSS 4.0

5.3CVSS: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

CVSS 3.1

6.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

CWE

CWE-287

Published

2026-10-27

Modified

2026-10-27

Record from

the CVE List, synced 2026-10-27

Affected

• jeremyckahn:chitchatter

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

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