---
id: CVE-2025-13837
title: >-
  When loading a plist file, the plistlib module reads data in size specified by
  the file itself, meaning a malicious file can cause OOM and DoS issues
summary: >-
  When loading a plist file, the plistlib module reads data in size specified by
  the file itself, meaning a malicious file can cause OOM and DoS issues
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
vendor: python
product: python
affected:
  - python < 3.13.10
  - 'python >= 3.14.0, < 3.14.1'
  - python = 3.15.0
patched:
  - python 3.14.1
published: '2025-12-01'
updated: '2026-09-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13837'
references:
  - url: >-
      https://github.com/python/cpython/commit/568342cfc8f002d9a15f30238f26b9d2e0e79036
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/5a8b19677d818fb41ee55f310233772e15aa1a2b
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/694922cf40aa3a28f898b5f5ee08b71b4922df70
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/71fa8eb8233b37f16c88b6e3e583b461b205d1ba
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/b64441e4852383645af5b435411a6f849dd1b4cb
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/cefee7d118a26ef6cd43db59bb9d98ca9a331111
    label: cna@python.org
  - url: 'https://github.com/python/cpython/issues/119342'
    label: cna@python.org
  - url: 'https://github.com/python/cpython/pull/119343'
    label: cna@python.org
  - url: >-
      https://mail.python.org/archives/list/security-announce@python.org/thread/2X5IBCJXRQAZ5PSERLHMSJFBHFR3QM2C/
    label: cna@python.org
tags:
  - nvd
epss: 0.00223
epssPercentile: 0.11474
ingestedAt: '2026-09-03T03:55:23.821Z'
---

## Overview

When loading a plist file, the plistlib module reads data in size specified by the file itself, meaning a malicious file can cause OOM and DoS issues

## Affected

- `python < 3.13.10`
- `python >= 3.14.0, < 3.14.1`
- `python = 3.15.0`

## Remediation

Upgrade past the affected range:

- `python 3.14.1`