7.5
HighCVSS 3.1 · from GitHub_M
CVE-2026-119286
GraphQL-core: Denial of service via memory leak in aborted validations
graphql-core · Uncontrolled resource use · CWE-400Affectedgraphql-core
FixNo fix listed yet.
PublishedOct 29, 21:38 · GitHub_M
ScoredOct 29 · 7.5 · GitHub_M
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:08 UTC
What we know
No known exploitation. CISA KEV, checked 22:08 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
A successful attack can take the service down. CVSS impact.
Description
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.3.0a3 until 3.3.1, validate() reuses a module-level ValidationAbortedError when a document exceeds max_errors. Python appends frames to the reused exception's traceback on every raise, retaining each document, validation context, and error set for the process lifetime. An unauthenticated client can repeatedly submit a small document with more than 100 validation errors to cause unbounded memory growth before query execution, eventually exhausting worker memory without disclosing or modifying data. This issue is fixed in version 3.3.1.
From GitHub_M
Affected and fixed versions
ProductAffectedFixed ingraphql-core>= 3.3.0a3, < 3.3.1–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known