# CVE-2026-42010 ## Summary - **CVE ID:** CVE-2026-42010 - **Severity:** HIGH - **CVSS Score:** 7.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N) - **CWE:** CWE-170 - **Published:** May 7, 2026 - **Last Modified:** Sep 4, 2026 ## Description 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. ## Affected Products - Red Hat — Red Hat Hardened Images (3.8.13-1.hum1) - Red Hat — Red Hat Enterprise Linux 8 (0:3.6.16-8.el8_10.6) - Red Hat — Red Hat Enterprise Linux 10 (0:3.8.10-4.el10_2) - Red Hat — Red Hat Enterprise Linux 9 (0:3.8.10-4.el9_8) - Red Hat — Red Hat Enterprise Linux 10.0 Extended Update Support (0:3.8.9-9.el10_0.19) - Red Hat — Red Hat Update Infrastructure 5 (1781525684) - Red Hat — Red Hat Update Infrastructure 5 (1781525671) - Red Hat — Red Hat Update Infrastructure 5 (1781525693) - Red Hat — Red Hat Update Infrastructure 5 (1781525739) - Red Hat — Red Hat Discovery 2 (1782159791) - Red Hat — Red Hat Discovery 2 (1782166952) - Red Hat — Red Hat Enterprise Linux 9.6 Extended Update Support (0:3.8.3-6.el9_6.4) - Red Hat — Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (0:3.6.14-10.el8_4.1) - Red Hat — Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (0:4.13-3.el8_4.1) - Red Hat — Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (0:3.6.14-10.el8_4.1) - Red Hat — Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On (0:4.13-3.el8_4.1) - Red Hat — Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (0:3.6.16-5.el8_6.5) - Red Hat — Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (0:4.13-3.el8_6.2) - Red Hat — Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (0:3.6.16-5.el8_6.5) - Red Hat — Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On (0:4.13-3.el8_6.2) - Red Hat — Red Hat Enterprise Linux 8.8 Telecommunications Update Service (0:3.6.16-7.el8_8.4) - Red Hat — Red Hat Enterprise Linux 8.8 Telecommunications Update Service (0:4.13-4.el8_8.1) - Red Hat — Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (0:3.6.16-7.el8_8.4) - Red Hat — Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions (0:4.13-4.el8_8.1) - Red Hat — Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions (0:3.8.3-4.el9_4.6) - Red Hat — Red Hat AI Inference Server 3.2 (1782951051) - Red Hat — Red Hat AI Inference Server 3.2 (1782951244) - Red Hat — Red Hat AI Inference Server 3.2 (1782951012) - Red Hat — Red Hat OpenShift Container Platform 4.20 (4.20.9.6.202607010620-0) - Red Hat — Red Hat OpenShift Container Platform 4.21 (4.21.9.6.202607011303-0) - Red Hat — Red Hat OpenShift Container Platform 4.22 (4.22.9.8.202606301732-0) - Red Hat — Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions (0:3.7.6-21.el9_2.7) - Red Hat — Red Hat OpenShift Container Platform 4.19 (4.19.9.6.202607151909-0) - Unknown product (0) - Red Hat — Red Hat Update Infrastructure 5 (1787241211) - Red Hat — Red Hat Update Infrastructure 5 (1787135742) - Red Hat — Red Hat Update Infrastructure 5 (1787241260) - Red Hat — Red Hat OpenShift Container Platform 4.18 (418.94.202608142238-0) - Red Hat — Red Hat OpenShift Container Platform 4.16 (416.94.202608150307-0) - Red Hat — Red Hat OpenShift Container Platform 4.12 (412.86.202608241157-0) - Red Hat — Red Hat OpenShift Container Platform 4.17 (417.94.202608250221-0) ## References - [CNA](https://access.redhat.com/security/cve/CVE-2026-42010) - [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2467289) - [CNA](https://access.redhat.com/errata/RHSA-2026:13274) - [CNA](https://access.redhat.com/errata/RHSA-2026:20611) - [CNA](https://access.redhat.com/errata/RHSA-2026:20613) - [CNA](https://access.redhat.com/errata/RHSA-2026:20612) - [CNA](https://access.redhat.com/errata/RHSA-2026:26319) - [CNA](https://access.redhat.com/errata/RHSA-2026:26409) - [CNA](https://access.redhat.com/errata/RHSA-2026:29197) - [CNA](https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-4) - [CNA](https://access.redhat.com/errata/RHSA-2026:30004) - [CNA](https://access.redhat.com/errata/RHSA-2026:30849) - [CNA](https://access.redhat.com/errata/RHSA-2026:30850) - [CNA](https://access.redhat.com/errata/RHSA-2026:32962) - [CNA](https://access.redhat.com/errata/RHSA-2026:33125) - [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42010.json) - [CNA](https://access.redhat.com/errata/RHSA-2026:36004) - [CNA](https://access.redhat.com/errata/RHSA-2026:36006) - [CNA](https://access.redhat.com/errata/RHSA-2026:36005) - [CNA](https://access.redhat.com/errata/RHSA-2026:34764) - [CNA](https://access.redhat.com/errata/RHSA-2026:34788) - [CNA](https://access.redhat.com/errata/RHSA-2026:34790) - [CNA](https://access.redhat.com/errata/RHSA-2026:41921) - [CNA](https://access.redhat.com/errata/RHSA-2026:40762) - [CNA](https://access.redhat.com/errata/RHSA-2026:58981) - [CNA](https://access.redhat.com/errata/RHSA-2026:57483) - [CNA](https://access.redhat.com/errata/RHSA-2026:56853) - [CNA](https://access.redhat.com/errata/RHSA-2026:59831) - [CNA](https://access.redhat.com/errata/RHSA-2026:60019) ## Exploitation Prediction (EPSS) - **EPSS Score:** 1.05% - **EPSS Percentile:** 62.1 --- _Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._