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Vulnerability · Published Jan 22, 2026 · Assigned by GitHub_M

CVE-2026-24009Docling Core vulnerable to Remote Code Execution via unsafe PyYAML usage

High 8.1

In plain English

A high-severity unsafe deserialization in docling-core from docling-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)1.5%top 25.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

Docling Core (or docling-core) is a library that defines core data types and transformations in the document processing application Docling. A PyYAML-related Remote Code Execution (RCE) vulnerability, namely CVE-2020-14343, is exposed in docling-core starting in version 2.21.0 and prior to version 2.48.4, specifically only if the application uses pyyaml prior to version 5.4 and invokes `docling_core.types.doc.DoclingDocument.load_from_yaml()` passing it untrusted YAML data. The vulnerability has been patched in docling-core version 2.48.4. The fix mitigates the issue by switching `PyYAML` deserialization from `yaml.FullLoader` to `yaml.SafeLoader`, ensuring that untrusted data cannot trigger code execution. Users who cannot immediately upgrade docling-core can alternatively ensure that the installed version of PyYAML is 5.4 or greater.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIdocling-core2.48.4GHSA-vqxf-v2gg-x3hc
PyPIdocling-core2.48.4PYSEC-2026-1313

Affected products (as reported)

VendorProductVersions
docling-project docling-core >= 2.21.0, < 2.48.4

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References