CVE-2026-42010NVD

Vulnerability Summary

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.

Severity Level

HIGH(7.1)

Published Date

May 7, 2026

Last Modified

Oct 14, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.94%Probability

Root Weakness (CWE)

CWE-170: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CWE-626: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 7.1 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityLow

AvailabilityNone

Affected & Patched Versions

Affected Versions

Gnu Gnutls
Redhat Hardened Images
Redhat Openshift Container Platform
Redhat Enterprise Linux

Patched Versions

Not provided by NVD for this CVE.

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