Midscene Bridge Server - Session Hijack via Unauthenticated WebSocket
Midscene Bridge Server through 1.10.3, fixed in commit 86f4118, contains a missing authentication and CORS misconfiguration vulnerability that allows unauthenticated remote attackers to hijack active bridge sessions by opening a cross-origin WebSocket connection to the local Socket.IO server, which performs no Origin header validation and requires no authentication token. Attackers can connect from any web page visited by the victim to seize the single-client slot, intercept and inject automation commands, exfiltrate command-payload data, or unconditionally terminate the server by supplying the MIDSCENE_BRIDGE_SIGNAL_KILL query parameter.
CVE-2026-59804
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-59804
midscene
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/web-infra-dev/midscene",
"vendor": "web-infra-dev",
"product": "midscene",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "1.10.3"
},
{
"status": "unaffected",
"version": "86f4118d1d847041c63d79e347e08c87c3f1a882",
"versionType": "git"
}
],
"packageURL": "pkg:npm/%40midscene/web",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-59804
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12986 · Revision 1
- Added to Heist Feed
- Publisher date