CVE-2026-33154 dynaconf Affected by Remote Code Execution (RCE) via Insecure Template Evaluation in @jinja Resolver
Attackers can execute arbitrary code via Server-Side Template Injection in dynaconf when the jinja2 package is installed and templates are evaluated.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33154?
CVE-2026-33154 is a high-severity code injection vulnerability in dynaconf, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
dynaconf is a configuration management tool for Python. Prior to version 3.2.13, Dynaconf is vulnerable to Server-Side Template Injection (SSTI) due to unsafe template evaluation in the @Jinja resolver. When the jinja2 package is installed, Dynaconf evaluates template expressions embedded in configuration values without a sandboxed environment. This issue has been patched in version 3.2.13.
Which versions are affected by CVE-2026-33154?
3 open source packages ship an affected version, including dynaconf. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
dynaconf PyPI | All versions | 3.2.13 |
dynaconf PyPI | All versions | 3.2.13 |
dynaconf PyPI | All versions | 3.2.13 |
Linux distribution packages (2)
python-dynaconf openSUSE:Leap 16.0 | All versions | 3.2.5-bp160.2.1 |
python-dynaconf openSUSE:Tumbleweed | All versions | 3.2.13-1.1 |
Products include Dynaconf Dynaconf.
How do I fix CVE-2026-33154?
Upgrade dynaconf to 3.2.13 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33154 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33154 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-33154, GHSA-pxrr-hq57-q35p, PYSEC-2026-2147, UBUNTU-CVE-2026-33154, USN-8231-1, openSUSE-SU-2026:10411-1 and 1 more.