{"id":"UBUNTU-CVE-2026-2781","details":"Integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, Thunderbird 140.8, and Firefox ESR 115.35.","modified":"2026-09-16T14:01:40.496453736Z","published":"2026-02-24T14:16:00Z","related":["USN-8071-1","USN-8071-2"],"upstream":["CVE-2026-2781"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-2781"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-2781"},{"type":"REPORT","url":"https://www.mozilla.org/security/advisories/mfsa2026-13/"},{"type":"REPORT","url":"https://www.mozilla.org/security/advisories/mfsa2026-15/"},{"type":"REPORT","url":"https://www.mozilla.org/security/advisories/mfsa2026-16/"},{"type":"REPORT","url":"https://www.mozilla.org/security/advisories/mfsa2026-17/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8071-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8071-2"}],"affected":[{"package":{"name":"nss","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.28.4-0ubuntu0.14.04.5+esm13"}]}],"versions":["2:3.15.1-1ubuntu1","2:3.15.2-1","2:3.15.3-1","2:3.15.3.1-1","2:3.15.3.1-1.1","2:3.15.3.1-1.1ubuntu1","2:3.15.4-1ubuntu3","2:3.15.4-1ubuntu4","2:3.15.4-1ubuntu5","2:3.15.4-1ubuntu6","2:3.15.4-1ubuntu7","2:3.15.4-1ubuntu7.1","2:3.17-0ubuntu0.14.04.1","2:3.17.1-0ubuntu0.14.04.1","2:3.17.1-0ubuntu0.14.04.2","2:3.17.4-0ubuntu0.14.04.1","2:3.19.2-0ubuntu0.14.04.1","2:3.19.2.1-0ubuntu0.14.04.1","2:3.19.2.1-0ubuntu0.14.04.2","2:3.21-0ubuntu0.14.04.1","2:3.21-0ubuntu0.14.04.2","2:3.23-0ubuntu0.14.04.1","2:3.26.2-0ubuntu0.14.04.3","2:3.28.4-0ubuntu0.14.04.1","2:3.28.4-0ubuntu0.14.04.2","2:3.28.4-0ubuntu0.14.04.3","2:3.28.4-0ubuntu0.14.04.4","2:3.28.4-0ubuntu0.14.04.5","2:3.28.4-0ubuntu0.14.04.5+esm1","2:3.28.4-0ubuntu0.14.04.5+esm2","2:3.28.4-0ubuntu0.14.04.5+esm3","2:3.28.4-0ubuntu0.14.04.5+esm4","2:3.28.4-0ubuntu0.14.04.5+esm5","2:3.28.4-0ubuntu0.14.04.5+esm6","2:3.28.4-0ubuntu0.14.04.5+esm7","2:3.28.4-0ubuntu0.14.04.5+esm8","2:3.28.4-0ubuntu0.14.04.5+esm9","2:3.28.4-0ubuntu0.14.04.5+esm10","2:3.28.4-0ubuntu0.14.04.5+esm11","2:3.28.4-0ubuntu0.14.04.5+esm12"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss3","binary_version":"2:3.28.4-0ubuntu0.14.04.5+esm13"},{"binary_name":"libnss3-1d","binary_version":"2:3.28.4-0ubuntu0.14.04.5+esm13"},{"binary_version":"2:3.28.4-0ubuntu0.14.04.5+esm13","binary_name":"libnss3-nssdb"},{"binary_name":"libnss3-tools","binary_version":"2:3.28.4-0ubuntu0.14.04.5+esm13"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.28.4-0ubuntu0.16.04.14+esm5"}]}],"versions":["2:3.19.2-1ubuntu1","2:3.19.2.1-0ubuntu1","2:3.21-1ubuntu2","2:3.21-1ubuntu3","2:3.21-1ubuntu4","2:3.23-0ubuntu0.16.04.1","2:3.26.2-0ubuntu0.16.04.2","2:3.28.4-0ubuntu0.16.04.1","2:3.28.4-0ubuntu0.16.04.2","2:3.28.4-0ubuntu0.16.04.3","2:3.28.4-0ubuntu0.16.04.4","2:3.28.4-0ubuntu0.16.04.5","2:3.28.4-0ubuntu0.16.04.6","2:3.28.4-0ubuntu0.16.04.8","2:3.28.4-0ubuntu0.16.04.9","2:3.28.4-0ubuntu0.16.04.10","2:3.28.4-0ubuntu0.16.04.11","2:3.28.4-0ubuntu0.16.04.12","2:3.28.4-0ubuntu0.16.04.13","2:3.28.4-0ubuntu0.16.04.14","2:3.28.4-0ubuntu0.16.04.14+esm1","2:3.28.4-0ubuntu0.16.04.14+esm2","2:3.28.4-0ubuntu0.16.04.14+esm3","2:3.28.4-0ubuntu0.16.04.14+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"2:3.28.4-0ubuntu0.16.04.14+esm5","binary_name":"libnss3"},{"binary_version":"2:3.28.4-0ubuntu0.16.04.14+esm5","binary_name":"libnss3-1d"},{"binary_name":"libnss3-nssdb","binary_version":"2:3.28.4-0ubuntu0.16.04.14+esm5"},{"binary_name":"libnss3-tools","binary_version":"2:3.28.4-0ubuntu0.16.04.14+esm5"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.35-2ubuntu2.16+esm1"}]}],"versions":["2:3.32-1ubuntu3","2:3.34-1ubuntu1","2:3.35-2ubuntu2","2:3.35-2ubuntu2.1","2:3.35-2ubuntu2.2","2:3.35-2ubuntu2.3","2:3.35-2ubuntu2.5","2:3.35-2ubuntu2.6","2:3.35-2ubuntu2.7","2:3.35-2ubuntu2.8","2:3.35-2ubuntu2.9","2:3.35-2ubuntu2.11","2:3.35-2ubuntu2.12","2:3.35-2ubuntu2.13","2:3.35-2ubuntu2.14","2:3.35-2ubuntu2.15","2:3.35-2ubuntu2.16"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss3","binary_version":"2:3.35-2ubuntu2.16+esm1"},{"binary_name":"libnss3-tools","binary_version":"2:3.35-2ubuntu2.16+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.20.04.2+esm1"}]}],"versions":["2:3.45-1ubuntu2","2:3.47-1ubuntu1","2:3.47-1ubuntu2","2:3.48-1ubuntu1","2:3.49.1-1ubuntu1","2:3.49.1-1ubuntu1.1","2:3.49.1-1ubuntu1.2","2:3.49.1-1ubuntu1.4","2:3.49.1-1ubuntu1.5","2:3.49.1-1ubuntu1.6","2:3.49.1-1ubuntu1.7","2:3.49.1-1ubuntu1.8","2:3.49.1-1ubuntu1.9","2:3.98-0ubuntu0.20.04.1","2:3.98-0ubuntu0.20.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:3.98-0ubuntu0.20.04.2+esm1","binary_name":"libnss3"},{"binary_name":"libnss3-tools","binary_version":"2:3.98-0ubuntu0.20.04.2+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.22.04.3"}]}],"versions":["2:3.68-1ubuntu1","2:3.68-1ubuntu2","2:3.68.2-0ubuntu1","2:3.68.2-0ubuntu1.1","2:3.68.2-0ubuntu1.2","2:3.98-0ubuntu0.22.04.1","2:3.98-0ubuntu0.22.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss3","binary_version":"2:3.98-0ubuntu0.22.04.3"},{"binary_name":"libnss3-tools","binary_version":"2:3.98-0ubuntu0.22.04.3"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"thunderbird","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/thunderbird?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:91.1.2+build1-0ubuntu1","1:91.3.0+build2-0ubuntu1","1:91.3.1+build1-0ubuntu1","1:91.3.2+build1-0ubuntu1","1:91.4.0+build1.1-0ubuntu1","1:91.4.0+build2-0ubuntu1","1:91.5.0+build1-0ubuntu1","1:91.5.1+build1-0ubuntu1","1:91.6.1+build1-0ubuntu1","1:91.7.0+build1-0ubuntu1","1:91.7.0+build2-0ubuntu1","1:91.8.0+build2-0ubuntu1","1:91.9.1+build1-0ubuntu0.22.04.1","1:91.11.0+build2-0ubuntu0.22.04.1","1:102.2.2+build1-0ubuntu0.22.04.1","1:102.4.2+build2-0ubuntu0.22.04.1","1:102.7.1+build2-0ubuntu0.22.04.1","1:102.8.0+build2-0ubuntu0.22.04.1","1:102.9.0+build1-0ubuntu0.22.04.1","1:102.10.0+build2-0ubuntu0.22.04.1","1:102.11.0+build1-0ubuntu0.22.04.1","1:102.13.0+build1-0ubuntu0.22.04.1","1:102.15.0+build1-0ubuntu0.22.04.1","1:102.15.1+build1-0ubuntu0.22.04.1","1:115.3.1+build1-0ubuntu0.22.04.2","1:115.4.1+build1-0ubuntu0.22.04.1","1:115.5.0+build1-0ubuntu0.22.04.1","1:115.6.0+build2-0ubuntu0.22.04.1","1:115.8.1+build1-0ubuntu0.22.04.1","1:115.9.0+build1-0ubuntu0.22.04.1","1:115.10.1+build1-0ubuntu0.22.04.1","1:115.11.0+build2-0ubuntu0.22.04.1","1:115.12.0+build3-0ubuntu0.22.04.1","1:115.13.0+build5-0ubuntu0.22.04.1","1:115.15.0+build1-0ubuntu0.22.04.1","1:115.16.0+build2-0ubuntu0.22.04.1","1:115.18.0+build1-0ubuntu0.22.04.1","1:128.12.0+build1-0ubuntu0.22.04.1","1:140.7.1+build1-0ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"thunderbird","binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1"},{"binary_name":"thunderbird-gnome-support","binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1"},{"binary_name":"thunderbird-mozsymbols","binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1"},{"binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1","binary_name":"xul-ext-calendar-timezones"},{"binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1","binary_name":"xul-ext-gdata-provider"},{"binary_name":"xul-ext-lightning","binary_version":"1:140.7.1+build1-0ubuntu0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-1ubuntu0.1"}]}],"versions":["2:3.92-1","2:3.94-1","2:3.95-1","2:3.96.1-1","2:3.98-1","2:3.98-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:3.98-1ubuntu0.1","binary_name":"libnss3"},{"binary_version":"2:3.98-1ubuntu0.1","binary_name":"libnss3-tools"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nss?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.114-1ubuntu0.1"}]}],"versions":["2:3.108-1ubuntu1","2:3.110-1","2:3.111-1","2:3.112-1","2:3.114-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss3","binary_version":"2:3.114-1ubuntu0.1"},{"binary_name":"libnss3-tools","binary_version":"2:3.114-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}},{"package":{"name":"nss","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/nss?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.120-1ubuntu1"}]}],"versions":["2:3.114-1","2:3.117-1","2:3.119-1","2:3.120-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2:3.120-1ubuntu1","binary_name":"libnss3"},{"binary_version":"2:3.120-1ubuntu1","binary_name":"libnss3-tools"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}