CVE-2026-27448

MEDIUM
2026-03-16 https://github.com/pyca/pyopenssl GHSA-vp96-hxj8-p424
5.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 16, 2026 - 16:00 vuln.today
Patch Released
Mar 16, 2026 - 16:00 nvd
Patch available
CVE Published
Mar 16, 2026 - 15:15 nvd
MEDIUM 5.3

Tags

Information Disclosure Redhat Suse

Description

If a user provided callback to `set_tlsext_servername_callback` raised an unhandled exception, this would result in a connection being accepted. If a user was relying on this callback for any security-sensitive behavior, this could allow bypassing it. Unhandled exceptions now result in rejecting the connection. Credit to **Leury Castillo** for reporting this issue.

Analysis

CVE-2026-27448 is a security vulnerability (CVSS 5.3). Remediation should follow standard vulnerability management procedures. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: 0

Vendor Status

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CVE-2026-27448 vulnerability details – vuln.today
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