Vulnerability record
CVE-2026-120399
The short answer
CVE-2026-120399 affects Red Hat Red Hat Edge Manager 1 and is rated high (CVSS 7.5). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
A flaw was found in flightctl. A TLS handshake is performed synchronously in the HTTP server’s connection-context callback without a deadline. A network-reachable unauthenticated client can stall the handshake and prevent the affected listener from accepting new connections.
Weakness: CWE-1322.
Severity
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Affected products
Red Hat Edge Manager 1. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-120399 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-10.
How do I fix CVE-2026-120399?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Awaiting Analysis. The description is NVD's text, quoted as published.
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