CVE-2024-56326

Aliases:GHSA-q2x7-8rv6-6q7h
Advisory lineage Upstream: 0 Downstream: 38
Modified
Published: 23 Dec 2024, 15:43
Last modified:03 Nov 2025, 19:32

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.57% LOW
1% probability +0.23%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Dec 2024, 15:43
Published
Vulnerability first disclosed
03 Nov 2025, 19:32
Last Modified
Vulnerability information updated

Description

Jinja is an extensible templating engine. Prior to 3.1.5, 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. This vulnerability is fixed in 3.1.5.

CVSS Metrics

  • v4.0•MEDIUM•Score: 5.4CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 5.4CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.57%• Percentile: 69%

Techniques & Countermeasures

  • CWE-693•Protection Mechanism Failure

    The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

  • CWE-1336•Improper Neutralization of Special Elements Used in a Template Engine

    The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

Affected Systems

  • pallets•jinja

    < 3.1.5

  • palletsprojects•jinja

    < 3.1.5

  • PyPI•jinja2

    < 3.1.5

References (6)