UBUNTU-CVE-2026-104635

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Source
https://ubuntu.com/security/CVE-2026-104635
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-104635
Upstream
Published
2026-10-13T00:00:00Z
Modified
2026-10-14T03:22:47Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Uncontrolled Recursion vulnerability in Protobuf.JSON.Decode in elixir-protobuf protobuf allows an unauthenticated remote attacker to crash the decoding process via a deeply nested JSON document. Any application that decodes attacker-supplied JSON with Protobuf.JSON.decode/3, Protobuf.JSON.decode!/3, or Protobuf.JSON.from_decoded/3 into a schema that contains a self-referential or cyclic message type is affected. In lib/protobuf/json/decode.ex, the embedded-message clause of decode_singular/3 recurses into internal_from_json_data/3 once per nesting level without incrementing or checking the decoder's depth counter. The depth guard increase_depth_and_maybe_throw/1 covers only the Google.Protobuf.ListValue and Google.Protobuf.Struct clauses, so the recursion_limit option has no effect on user-defined message types. Each nesting level allocates a stack frame and heap objects, and a sufficiently deep document exhausts the memory of the decoding process. Confidentiality and integrity are not affected. This issue affects protobuf: from 0.8.0 before 0.17.1.

References

Affected packages

Ubuntu:22.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.12.4-1ubuntu3
3.12.4-1ubuntu5
3.12.4-1ubuntu6
3.12.4-1ubuntu7
3.12.4-1ubuntu7.22.04.1
3.12.4-1ubuntu7.22.04.2
3.12.4-1ubuntu7.22.04.4
3.12.4-1ubuntu7.22.04.6

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "elpa-protobuf-mode",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "libprotobuf-lite23",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "libprotobuf23",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "libprotoc23",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "python3-protobuf",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        },
        {
            "binary_name":  "ruby-google-protobuf",
            "binary_version":  "3.12.4-1ubuntu7.22.04.6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:24.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.21.12-7ubuntu1
3.21.12-8ubuntu1
3.21.12-8ubuntu5
3.21.12-8.2
3.21.12-8.2build1
3.21.12-8.2ubuntu0.1
3.21.12-8.2ubuntu0.2
3.21.12-8.2ubuntu0.3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "elpa-protobuf-mode",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "libprotobuf-lite32t64",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "libprotobuf32t64",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "libprotoc32t64",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "php-google-protobuf",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "python3-protobuf",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        },
        {
            "binary_name":  "ruby-google-protobuf",
            "binary_version":  "3.21.12-8.2ubuntu0.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:26.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.21.12-11ubuntu3
3.21.12-14
3.21.12-14build1
3.21.12-15
3.21.12-15ubuntu1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "elpa-protobuf-mode",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "libprotobuf-lite32t64",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "libprotobuf32t64",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "libprotoc32t64",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "php-google-protobuf",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "python3-protobuf",
            "binary_version":  "3.21.12-15ubuntu1"
        },
        {
            "binary_name":  "ruby-google-protobuf",
            "binary_version":  "3.21.12-15ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:Pro:14.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

2.*
2.4.1-3ubuntu2
2.4.1-3ubuntu3
2.4.1-3ubuntu4
2.5.0-5ubuntu2
2.5.0-7ubuntu1
2.5.0-8ubuntu1
2.5.0-9ubuntu1
2.5.0-9ubuntu1+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        },
        {
            "binary_name":  "libprotobuf-lite8",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        },
        {
            "binary_name":  "libprotobuf8",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        },
        {
            "binary_name":  "libprotoc8",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        },
        {
            "binary_name":  "python-protobuf",
            "binary_version":  "2.5.0-9ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:Pro:16.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=esm-infra%2Fxenial

Affected ranges

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

Affected versions

2.*
2.6.1-1.2
2.6.1-1.3
2.6.1-1.3ubuntu0.1~esm1
2.6.1-1.3ubuntu0.1~esm2
2.6.1-1.3ubuntu0.1~esm4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        },
        {
            "binary_name":  "libprotobuf-lite9v5",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        },
        {
            "binary_name":  "libprotobuf9v5",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        },
        {
            "binary_name":  "libprotoc9v5",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        },
        {
            "binary_name":  "python-protobuf",
            "binary_version":  "2.6.1-1.3ubuntu0.1~esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:Pro:18.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

3.*
3.0.0-9ubuntu5
3.0.0-9ubuntu6
3.0.0-9.1ubuntu1
3.0.0-9.1ubuntu1.1
3.0.0-9.1ubuntu1.1+esm3
3.0.0-9.1ubuntu1.1+esm4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "libprotobuf-lite10",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "libprotobuf10",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "libprotoc10",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "python-protobuf",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        },
        {
            "binary_name":  "python3-protobuf",
            "binary_version":  "3.0.0-9.1ubuntu1.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"
Ubuntu:Pro:20.04:LTS
protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf?arch=source&distro=esm-infra%2Ffocal

Affected ranges

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

Affected versions

3.*
3.6.1.3-2
3.6.1.3-2ubuntu1
3.6.1.3-2ubuntu3
3.6.1.3-2ubuntu4
3.6.1.3-2ubuntu5
3.6.1.3-2ubuntu5.2
3.6.1.3-2ubuntu5.2+esm2
3.6.1.3-2ubuntu5.2+esm3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libprotobuf-java",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "libprotobuf-lite17",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "libprotobuf17",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "libprotoc17",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "protobuf-compiler",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "python-protobuf",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "python3-protobuf",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        },
        {
            "binary_name":  "ruby-google-protobuf",
            "binary_version":  "3.6.1.3-2ubuntu5.2+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-104635.json"