UBUNTU-CVE-2026-2781

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Source
https://ubuntu.com/security/CVE-2026-2781
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-2781
Upstream
Downstream
Related
Published
2026-02-24T14:16:00Z
Modified
2026-03-10T03:58:47.363131Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Integer overflow in the Libraries component in NSS. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

References

Affected packages

Ubuntu:22.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.22.04.3?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.98-0ubuntu0.22.04.3

Affected versions

2:3.*
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_version": "2:3.98-0ubuntu0.22.04.3",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.22.04.3",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.22.04.3",
            "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"
thunderbird

Package

Name
thunderbird
Purl
pkg:deb/ubuntu/thunderbird@1:140.7.1+build1-0ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:91.*
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.*
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.*
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.*
1:128.12.0+build1-0ubuntu0.22.04.1
1:140.*
1:140.7.1+build1-0ubuntu0.22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:140.7.1+build1-0ubuntu0.22.04.1",
            "binary_name": "thunderbird"
        },
        {
            "binary_version": "1:140.7.1+build1-0ubuntu0.22.04.1",
            "binary_name": "thunderbird-dev"
        },
        {
            "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_name": "xul-ext-calendar-timezones"
        },
        {
            "binary_version": "1:140.7.1+build1-0ubuntu0.22.04.1",
            "binary_name": "xul-ext-gdata-provider"
        },
        {
            "binary_version": "1:140.7.1+build1-0ubuntu0.22.04.1",
            "binary_name": "xul-ext-lightning"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-2781.json"
Ubuntu:24.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.98-1ubuntu0.1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.98-1ubuntu0.1

Affected versions

2:3.*
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-dev"
        },
        {
            "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"
Ubuntu:25.10
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.114-1ubuntu0.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.114-1ubuntu0.1

Affected versions

2:3.*
2:3.108-1ubuntu1
2:3.110-1
2:3.111-1
2:3.112-1
2:3.114-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:3.114-1ubuntu0.1",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.114-1ubuntu0.1",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.114-1ubuntu0.1",
            "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"
Ubuntu:Pro:14.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.14.04.5+esm13?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.14.04.5+esm13

Affected versions

2:3.*
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_version": "2:3.28.4-0ubuntu0.14.04.5+esm13",
            "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_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm13",
            "binary_name": "libnss3-nssdb"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.14.04.5+esm13",
            "binary_name": "libnss3-tools"
        }
    ],
    "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"
Ubuntu:Pro:16.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.28.4-0ubuntu0.16.04.14+esm5?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.28.4-0ubuntu0.16.04.14+esm5

Affected versions

2:3.*
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_version": "2:3.28.4-0ubuntu0.16.04.14+esm5",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm5",
            "binary_name": "libnss3-nssdb"
        },
        {
            "binary_version": "2:3.28.4-0ubuntu0.16.04.14+esm5",
            "binary_name": "libnss3-tools"
        }
    ],
    "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"
Ubuntu:Pro:18.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.35-2ubuntu2.16+esm1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.35-2ubuntu2.16+esm1

Affected versions

2:3.*
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_version": "2:3.35-2ubuntu2.16+esm1",
            "binary_name": "libnss3"
        },
        {
            "binary_version": "2:3.35-2ubuntu2.16+esm1",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.35-2ubuntu2.16+esm1",
            "binary_name": "libnss3-tools"
        }
    ],
    "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"
Ubuntu:Pro:20.04:LTS
nss

Package

Name
nss
Purl
pkg:deb/ubuntu/nss@2:3.98-0ubuntu0.20.04.2+esm1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:3.98-0ubuntu0.20.04.2+esm1

Affected versions

2:3.*
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_version": "2:3.98-0ubuntu0.20.04.2+esm1",
            "binary_name": "libnss3-dev"
        },
        {
            "binary_version": "2:3.98-0ubuntu0.20.04.2+esm1",
            "binary_name": "libnss3-tools"
        }
    ],
    "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"