Attestkeep
Language: English
Sign up

Vulnerabilities / CVE-2026-42010

critical

CVE-2026-42010

gnutls: gnutls: Authentication Bypass via NUL Character in Username

Published Modified CWE 170, 626
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (high), AlmaLinux (high), Amazon (high), Oracle (high), Rocky Linux (high), Azure Linux (medium), Ubuntu (medium).

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 packages and fixed versions

SourcePackageFixed in
Photon OS 4.0gnutls, gnutls-devel3.7.10-7.ph4
Photon OS 5.0gnutls, gnutls-devel3.8.13-1.ph5
alma 10gnutls, gnutls-c++, gnutls-dane and 3 more3.8.10-4.el10_2
alma 8gnutls, gnutls-c++, gnutls-dane and 2 more3.6.16-8.el8_10.6
alma 9gnutls, gnutls-c++, gnutls-dane and 2 more3.8.10-4.el9_8
alpine 3.20gnutls3.8.13-r0
alpine 3.21gnutls3.8.13-r0
alpine 3.22gnutls3.8.13-r0
alpine 3.23gnutls3.8.13-r0
alpine 3.24gnutls3.8.13-r0
alpine edgegnutls3.8.13-r0
amazon linux 2023gnutls, gnutls-c++, gnutls-c++-debuginfo and 7 more3.8.3-8.amzn2023.0.3
Show all 124 entries from 52 sources
SourcePackageFixed in
Photon OS 4.0gnutls3.7.10-7.ph4
Photon OS 4.0gnutls-devel3.7.10-7.ph4
Photon OS 5.0gnutls3.8.13-1.ph5
Photon OS 5.0gnutls-devel3.8.13-1.ph5
alma 10gnutls3.8.10-4.el10_2
alma 10gnutls-c++3.8.10-4.el10_2
alma 10gnutls-dane3.8.10-4.el10_2
alma 10gnutls-devel3.8.10-4.el10_2
alma 10gnutls-fips3.8.10-4.el10_2
alma 10gnutls-utils3.8.10-4.el10_2
alma 8gnutls3.6.16-8.el8_10.6
alma 8gnutls-c++3.6.16-8.el8_10.6
alma 8gnutls-dane3.6.16-8.el8_10.6
alma 8gnutls-devel3.6.16-8.el8_10.6
alma 8gnutls-utils3.6.16-8.el8_10.6
alma 9gnutls3.8.10-4.el9_8
alma 9gnutls-c++3.8.10-4.el9_8
alma 9gnutls-dane3.8.10-4.el9_8
alma 9gnutls-devel3.8.10-4.el9_8
alma 9gnutls-utils3.8.10-4.el9_8
alpine 3.20gnutls3.8.13-r0
alpine 3.21gnutls3.8.13-r0
alpine 3.22gnutls3.8.13-r0
alpine 3.23gnutls3.8.13-r0
alpine 3.24gnutls3.8.13-r0
alpine edgegnutls3.8.13-r0
amazon linux 2023gnutls3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-c++3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-c++-debuginfo3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-dane3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-dane-debuginfo3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-debuginfo3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-debugsource3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-devel3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-utils3.8.3-8.amzn2023.0.3
amazon linux 2023gnutls-utils-debuginfo3.8.3-8.amzn2023.0.3
Azure Linux 3.0gnutls0:3.8.3-11.azl3
debian 11gnutls283.7.1-5+deb11u10
debian 12gnutls283.7.9-2+deb12u7
debian 13gnutls283.8.9-3+deb13u4
debian 14gnutls283.8.13-1
echognutls283.7.9-2+deb12u7
Oracle Linux 8gnutls3.6.16-8.el8_10.6
Oracle Linux 8gnutls-c++3.6.16-8.el8_10.6
Oracle Linux 8gnutls-dane3.6.16-8.el8_10.6
Oracle Linux 8gnutls-devel3.6.16-8.el8_10.6
Oracle Linux 8gnutls-utils3.6.16-8.el8_10.6
Oracle Linux 9gnutls3.8.10-4.el9_8
Oracle Linux 9gnutls-c++3.8.10-4.el9_8
Oracle Linux 9gnutls-dane3.8.10-4.el9_8
Oracle Linux 9gnutls-devel3.8.10-4.el9_8
Oracle Linux 9gnutls-utils3.8.10-4.el9_8
rapidfort alma 10gnutls0:3.8.10-4.el10_2
rapidfort alma 10gnutls-dane0:3.8.10-4.el10_2
rapidfort alma 10gnutls-devel3.8.10-4.el10_2
rapidfort alma 10gnutls-fips3.8.10-4.el10_2
rapidfort alma 10gnutls-utils0:3.8.10-4.el10_2
rapidfort alma 9gnutls0:3.8.10-4.el9_8
rapidfort alma 9gnutls-dane0:3.8.10-4.el9_8
rapidfort alma 9gnutls-devel3.8.10-4.el9_8
rapidfort alma 9gnutls-utils0:3.8.10-4.el9_8
rapidfort alpine 3.20gnutls3.8.13-r0
rapidfort alpine 3.21gnutls3.8.13-r0
rapidfort alpine 3.22gnutls3.8.13-r0
rapidfort alpine 3.23gnutls3.8.13-r0
rapidfort alpine 3.24gnutls3.8.13-r0
rapidfort amazon linux 2023gnutls0:3.8.3-8.amzn2023.0.3
rapidfort amazon linux 2023gnutls-c++3.8.3-8.amzn2023.0.3
rapidfort amazon linux 2023gnutls-dane0:3.8.3-8.amzn2023.0.3
rapidfort amazon linux 2023gnutls-devel3.8.3-8.amzn2023.0.3
rapidfort amazon linux 2023gnutls-utils3.8.3-8.amzn2023.0.3
rapidfort debian 12gnutls280:3.7.9-2+deb12u7, 0:3.8.13-1, 0:3.8.9-3+deb13u4
rapidfort debian 12rf-gnutls280:3.8.13-1, 0:3.8.9-3+deb13u4
rapidfort debian 13gnutls280:3.7.9-2+deb12u7, 0:3.8.13-1, 0:3.8.9-3+deb13u4
rapidfort debian 13rf-gnutls280:3.8.13-1, 0:3.8.9-3+deb13u4
rapidfort Oracle Linux 10gnutls0:3.8.10-4.el10_2
rapidfort Oracle Linux 10gnutls-c++0:3.8.10-4.el10_2
rapidfort Oracle Linux 10gnutls-dane0:3.8.10-4.el10_2
rapidfort Oracle Linux 10gnutls-devel0:3.8.10-4.el10_2
rapidfort Oracle Linux 10gnutls-fips0:3.8.10-4.el10_2
rapidfort Oracle Linux 10gnutls-utils0:3.8.10-4.el10_2
rapidfort Oracle Linux 9gnutls0:3.8.10-4.el9_8
rapidfort Oracle Linux 9gnutls-c++0:3.8.10-4.el9_8
rapidfort Oracle Linux 9gnutls-dane0:3.8.10-4.el9_8
rapidfort Oracle Linux 9gnutls-devel0:3.8.10-4.el9_8
rapidfort Oracle Linux 9gnutls-utils0:3.8.10-4.el9_8
rapidfort rocky 9gnutls0:3.8.10-4.el9_8
rapidfort rocky 9gnutls-c++0:3.8.10-4.el9_8
rapidfort rocky 9gnutls-dane0:3.8.10-4.el9_8
rapidfort rocky 9gnutls-devel0:3.8.10-4.el9_8
rapidfort rocky 9gnutls-utils0:3.8.10-4.el9_8
rapidfort rocky 9rf-gnutls0:3.8.10-4.el9_8
rapidfort rocky 9rf-gnutls-dane0:3.8.10-4.el9_8
rapidfort ubuntu 20.04gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
rapidfort ubuntu 20.04rf-gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
rapidfort ubuntu 22.04gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
rapidfort ubuntu 22.04rf-gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
rapidfort ubuntu 24.04gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
rapidfort ubuntu 24.04rf-gnutls280:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2
Red Hatopenshift/ose-rhel-coreos-8no fix listed
Red Hatopenshift/ose-rhel-coreos-9no fix listed
rocky 10gnutls3.8.10-4.el10_2
rocky 8gnutls3.6.16-8.el8_10.6
rocky 9gnutls3.8.10-4.el9_8
root.io alpine 3.22rootio-gnutls3.8.13-r0
root.io debian 12gnutls283.7.9-2+deb12u7
root.io debian 12rootio-gnutls283.7.9-2+deb12u7
root.io debian 13gnutls283.8.9-3+deb13u4
root.io debian 13rootio-gnutls283.8.9-3+deb13u4
seal debiangnutls283.7.9-2+sp999, 3.7.9-2+deb12u4+sp999, 3.8.3-1.1ubuntu3.2+sp999
seal debianseal-gnutls283.7.9-2+sp999, 3.7.9-2+deb12u4+sp999, 3.8.3-1.1ubuntu3.2+sp999
seal Red Hat 6libtasn12.3-6.el6_5+sp999
seal Red Hat 6seal-libtasn12.3-6.el6_5+sp999
seal Red Hat 7libtasn14.10-1.el7+sp999
seal Red Hat 7seal-libtasn14.10-1.el7+sp999
seal Red Hat 8gnutls3.6.16-8.el8_9.3+sp2
seal Red Hat 8libtasn14.13-4.el8_7+sp999
seal Red Hat 8seal-gnutls3.6.16-8.el8_9.3+sp2
seal Red Hat 8seal-libtasn14.13-4.el8_7+sp999
ubuntu 20.04-ESMgnutls283.6.13-2ubuntu1.12+esm2
ubuntu 22.04gnutls283.7.3-4ubuntu1.9
ubuntu 24.04gnutls283.8.3-1.1ubuntu3.6
ubuntu 25.10gnutls283.8.9-3ubuntu2.2
ubuntu 26.04gnutls283.8.12-2ubuntu1.1

References

All 81 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.