boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-42010CRITICAL
Red Hat Red Hat Enterprise Linux 10 — Gnutls: gnutls: authentication bypass via nul character in username
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0105   61.6     —
AFFECTED
  Product                                                                Versions     Fixed
  Red Hat Enterprise Linux 10                                            unspecified  0:3.8.10-4.el10_2
  Red Hat Enterprise Linux 10.0 Extended Update Support                  unspecified  0:3.8.9-9.el10_0.19
  Red Hat Enterprise Linux 8                                             unspecified  0:3.6.16-8.el8_10.6
  Red Hat Enterprise Linux 8                                             unspecified  0:3.6.16-8.el8_10.6
  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support  unspecified  0:3.6.14-10.el8_4.1
  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support  unspecified  0:4.13-3.el8_4.1
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On  unspecified  0:3.6.14-10.el8_4.1
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On  unspecified  0:4.13-3.el8_4.1
  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support  unspecified  0:3.6.16-5.el8_6.5
  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support  unspecified  0:4.13-3.el8_6.2
  + 28 more
TIMELINE
  Apr 23  Reserved by redhat
  May 7   Published (CNA: redhat)
  Jul 23  RESCORED — CVE-2026-42010 (Red Hat Enterprise Linux 10). CVSS 7.1 → 9.8 (NVD).
CWE-170, CWE-626 · CNA: redhat · CVSS v3.1 · 24 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
DateEventDetail
April 23, 2026ReservedReserved by redhat
May 7, 2026PublishedPublished (CNA: redhat)
July 23, 2026RESCOREDRESCORED — CVE-2026-42010 (Red Hat Enterprise Linux 10). CVSS 7.1 → 9.8 (NVD).

Affected

Affected products and packages — 38 rows
VendorProduct / PackageEcosystemVersion introducedFixed
Red HatRed Hat Enterprise Linux 10——0:3.8.10-4.el10_2
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support——0:3.8.9-9.el10_0.19
Red HatRed Hat Enterprise Linux 8——0:3.6.16-8.el8_10.6
Red HatRed Hat Enterprise Linux 8——0:3.6.16-8.el8_10.6
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support——0:3.6.14-10.el8_4.1
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support——0:4.13-3.el8_4.1
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On——0:3.6.14-10.el8_4.1
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On——0:4.13-3.el8_4.1
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support——0:3.6.16-5.el8_6.5
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support——0:4.13-3.el8_6.2
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On——0:3.6.16-5.el8_6.5
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On——0:4.13-3.el8_6.2
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service——0:3.6.16-7.el8_8.4
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service——0:4.13-4.el8_8.1
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions——0:3.6.16-7.el8_8.4
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions——0:4.13-4.el8_8.1
Red HatRed Hat Enterprise Linux 9——0:3.8.10-4.el9_8
Red HatRed Hat Enterprise Linux 9——0:3.8.10-4.el9_8
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions——0:3.7.6-21.el9_2.7
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions——0:3.8.3-4.el9_4.6
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support——0:3.8.3-6.el9_6.4
Red HatRed Hat OpenShift Container Platform 4.19——4.19.9.6.202607151909-0
Red HatRed Hat OpenShift Container Platform 4.20——4.20.9.6.202607010620-0
Red HatRed Hat OpenShift Container Platform 4.21——4.21.9.6.202607011303-0
Red HatRed Hat OpenShift Container Platform 4.22——4.22.9.8.202606301732-0
Red HatRed Hat AI Inference Server 3.2——1782951051
Red HatRed Hat AI Inference Server 3.2——1782951012
Red HatRed Hat AI Inference Server 3.2——1782951244
Red HatRed Hat Discovery 2——1782159791
Red HatRed Hat Discovery 2——1782166952
Red HatRed Hat Hardened Images——3.8.13-1.hum1
Red HatRed Hat Update Infrastructure 5——1781525684
Red HatRed Hat Update Infrastructure 5——1781525671
Red HatRed Hat Update Infrastructure 5——1781525693
Red HatRed Hat Update Infrastructure 5——1781525739
Red HatRed Hat Enterprise Linux 6———
Red HatRed Hat Enterprise Linux 7———
Red HatRed Hat OpenShift Container Platform 4———

Weaknesses

CWE-170 · CWE-626

References (24)

Related

Authoritative record: CVE-2026-42010 at cve.org

Vendors: red hat

Weaknesses: CWE-170 · CWE-626

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42010 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.