Apache

CVE-2023-47248: PyArrow, PyArrow: Arbitrary code execution when loading a malicious data file

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 16 Mar 2025. It cites 385 public reports, the first from 16 Mar 2025. VulnCheck's own honeypots also recorded exploitation attempts.

How likely is exploitation in the next 30 days?

14.5%

EPSS score, percentile 96.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (3)

Which versions are affected?

Affected

0.14.0 through 14.0.0
0.14.0 through 14.0.0

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

PyArrow, PyArrow: Arbitrary code execution when loading a malicious data file

Deserialization of untrusted data in IPC and Parquet readers in PyArrow versions 0.14.0 to 14.0.0 allows arbitrary code execution. An application is vulnerable if it reads Arrow IPC, Feather or Parquet data from untrusted sources (for example user-supplied input files). This vulnerability only affects PyArrow, not other Apache Arrow implementations or bindings. It is recommended that users of PyArrow upgrade to 14.0.1. Similarly, it is recommended that downstream libraries upgrade their dependency requirements to PyArrow 14.0.1 or later. PyPI packages are already available, and we hope that conda-forge packages will be available soon. If it is not possible to upgrade, we provide a separate package `pyarrow-hotfix` that disables the vulnerability on older PyArrow versions. See https://pypi.org/project/pyarrow-hotfix/ for instructions.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

github.com (Patch)
lists.apache.org (Vendor advisory)
pypi.org (Mitigation)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (2 products)

Apache Software Foundation PyArrow
Status	Versions
Affected	0.14.0 through 14.0.0

Versions not listed are: unaffected.

Apache Software Foundation PyArrow
Status	Versions
Affected	0.14.0 through 14.0.0

Versions not listed are: unaffected.

Source: CVE List, as of 30 Oct 2026. About the data.

Weakness

CWE-502

CWE-502: Deserialization of Untrusted Data

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

Date	Event
9 Nov 2023	CVE record published
13 Feb 2025	CVE record last updated

References

Known exploited Apache vulnerabilities

CVE-2016-3081: Apache Struts Command Injection Vulnerability (added 8 Oct 2026)
CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (added 4 Aug 2026)
CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability (added 16 Apr 2026)
CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability (added 1 May 2025)
CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability (added 1 Apr 2025)