CVE-2026-118129 Details
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.
A vulnerability exists in the Chitchatter application by jeremyckahn, specifically in the PostMessage Handler component. The issue arises in versions of the application prior to the commit e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688. The vulnerability is due to improper authentication in the 'isConfigMessageEvent' function within 'src/Bootstrap.tsx'. This flaw allows remote exploitation by manipulating the 'parentDomain' argument, leading to a config-injection attack that replaces a user's cryptographic identity keys with attacker-controlled values. The vulnerability is present in the 'develop' branch of the Chitchatter repository.
The vulnerability has been patched in the Chitchatter repository. Users should update to the latest version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 28, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/0xGenesi/CVE/blob/main/Chitchatter_SDK_postMessage_Identity_Key_Injection.md | [email protected] | ExploitRemedyTechnical Analysis |
| https://github.com/jeremyckahn/chitchatter/ | [email protected] | ProductSource CodeVendor |
| https://github.com/jeremyckahn/chitchatter/commit/e3babb5cd83bfe3b99f1d82358ac5c1ea8e8a688 | [email protected] | Source CodeVendor |
| https://github.com/jeremyckahn/chitchatter/pull/635 | [email protected] | Issue TrackingVendor |
| https://vuldb.com/cve/CVE-2026-118129 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/1015027 | [email protected] | Permission Required |
| https://vuldb.com/vuln/427456 | [email protected] | Permission Required |
| https://vuldb.com/vuln/427456/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| jeremyckahn Chitchatter | develop @ 23b62a8 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Oct 28, 2026 | New CVE Received | [email protected] |