UBUNTU-CVE-2026-75508

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Source
https://ubuntu.com/security/CVE-2026-75508
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-75508
Upstream
Published
2026-10-26T00:00:00Z
Modified
2026-10-27T04:17:56Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.2.3 until 3.2.12 and 3.3.0rc1, the parser's max_tokens limit in Parser.advance_lexer counts only non-comment tokens returned after Lexer.lookahead skips comments. Each skipped comment is still allocated as a Token and retained through token.next and token.prev, allowing a highly compressible comment-padded GraphQL document to pass a low token limit while consuming memory. An unauthenticated remote attacker can exhaust worker memory before AST-based depth or complexity controls run. This issue is fixed in versions 3.2.12 and 3.3.0rc1.

References

Affected packages

Ubuntu:22.04:LTS / graphql-core

Package

Name
graphql-core
Purl
pkg:deb/ubuntu/graphql-core?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.3.2-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-graphql-core",
            "binary_version":  "2.3.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"

Ubuntu:24.04:LTS / graphql-core

Package

Name
graphql-core
Purl
pkg:deb/ubuntu/graphql-core?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.2.3-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-graphql-core",
            "binary_version":  "3.2.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"

Ubuntu:26.10 / graphql-core

Package

Name
graphql-core
Purl
pkg:deb/ubuntu/graphql-core?arch=source&distro=stonking

Affected ranges

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

Affected versions

3.*
3.2.7-1
3.2.8-1
3.2.11-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-graphql-core",
            "binary_version":  "3.2.11-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"

Ubuntu:26.04:LTS / graphql-core

Package

Name
graphql-core
Purl
pkg:deb/ubuntu/graphql-core?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.2.6-1
3.2.6-2
3.2.7-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-graphql-core",
            "binary_version":  "3.2.7-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75508.json"