High severity7.1NVD Advisory· Published May 7, 2026· Updated Jul 23, 2026
CVE-2026-42010
CVE-2026-42010
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
16- cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords7 versionspkg:rpm/almalinux/gnutlspkg:rpm/almalinux/gnutls-c%2B%2Bpkg:rpm/almalinux/gnutls-danepkg:rpm/almalinux/gnutls-develpkg:rpm/almalinux/gnutls-fipspkg:rpm/almalinux/gnutls-utilspkg:rpm/opensuse/gnutls&distro=openSUSE%20Tumbleweed
< 3.6.16-8.el8_10.6+ 6 more
- (no CPE)range: < 3.6.16-8.el8_10.6
- (no CPE)range: < 3.6.16-8.el8_10.6
- (no CPE)range: < 3.6.16-8.el8_10.6
- (no CPE)range: < 3.6.16-8.el8_10.6
- (no CPE)range: < 3.8.10-4.el10_2
- (no CPE)range: < 3.6.16-8.el8_10.6
- (no CPE)range: < 3.8.13-1.1
Patches
Vulnerability mechanics
References
24- access.redhat.com/security/cve/CVE-2026-42010nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:13274nvd
- access.redhat.com/errata/RHSA-2026:20611nvd
- access.redhat.com/errata/RHSA-2026:20612nvd
- access.redhat.com/errata/RHSA-2026:20613nvd
- access.redhat.com/errata/RHSA-2026:26319nvd
- access.redhat.com/errata/RHSA-2026:26409nvd
- access.redhat.com/errata/RHSA-2026:29197nvd
- access.redhat.com/errata/RHSA-2026:30004nvd
- access.redhat.com/errata/RHSA-2026:30849nvd
- access.redhat.com/errata/RHSA-2026:30850nvd
- access.redhat.com/errata/RHSA-2026:32962nvd
- access.redhat.com/errata/RHSA-2026:33125nvd
- access.redhat.com/errata/RHSA-2026:34764nvd
- access.redhat.com/errata/RHSA-2026:34788nvd
- access.redhat.com/errata/RHSA-2026:34790nvd
- access.redhat.com/errata/RHSA-2026:36004nvd
- access.redhat.com/errata/RHSA-2026:36005nvd
- access.redhat.com/errata/RHSA-2026:36006nvd
- access.redhat.com/errata/RHSA-2026:40762nvd
- access.redhat.com/errata/RHSA-2026:41921nvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42010.jsonnvd
- www.gnutls.org/security-new.htmlnvd
News mentions
1- ⚡ Weekly Recap: Exchange 0-Day, npm Worm, Fake AI Repo, Cisco Exploit and MoreThe Hacker News · May 18, 2026