What is CVE-2026-24009?

CVE-2026-24009 is a high-severity vulnerability in Docling Docling-Core, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-01-22.

How severe is CVE-2026-24009?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2026-24009 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Docling Docling-Core

CVE-2026-24009

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.

Vulnerability class: Insecure Deserialization

Published 2026-01-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.016 · change: +0.002

Affected products

Docling Docling-Core
Docling-Project Docling-Core — versions >= 2.21.0, < 2.48.4

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

BiranPeretz/docling-core-CVE-2026-24009

References

github.com/docling-project/docling-core/security/advisories/GHSA-vqxf-v2gg-x3hc (Patch, Mitigation, Vendor Advisory)
github.com/docling-project/docling-core/issues/482 (Issue Tracking)
github.com/docling-project/docling-core/commit/3e8d628eeeae50f0f8f239c8c7fea773… (Patch)
github.com/advisories/GHSA-8q59-q68h-6hv4 (Not Applicable)
github.com/docling-project/docling-core/releases/tag/v2.48.4 (Product, Release Notes)

Frequently asked questions

What is CVE-2026-24009?: CVE-2026-24009 is a high-severity vulnerability in Docling Docling-Core, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-01-22.
How severe is CVE-2026-24009?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2026-24009 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.