CVE-2024-56326 – jinja2

Package

Manager: pip
Name: jinja2
Vulnerable Version: >=0 <3.1.5

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00046 pctl0.13657

Details

Jinja has a sandbox breakout through indirect reference to format method An oversight in how the Jinja sandboxed environment detects calls to `str.format` allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to `str.format` and ensures they don't escape the sandbox. However, it's possible to store a reference to a malicious string's `format` method, then pass that to a filter that calls it. No such filters are built-in to Jinja, but could be present through custom filters in an application. After the fix, such indirect calls are also handled by the sandbox.

Metadata

Created: 2024-12-23T17:56:08Z
Modified: 2024-12-27T19:10:36Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-q2x7-8rv6-6q7h/GHSA-q2x7-8rv6-6q7h.json
CWE IDs: ["CWE-693"]
Alternative ID: GHSA-q2x7-8rv6-6q7h
Finding: F115
Auto approve: 1