CVE-2026-33046 Indico discloses local files resulting in Remote Code Execution through LaTeX injection
Attackers can execute arbitrary code and read local files via LaTeX injection in Indico if server-side rendering is enabled.
- 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-2026-33046?
CVE-2026-33046 is a high-severity code injection vulnerability in indico, published on 23 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. In versions prior to 3.3.12, due to vulnerabilities in TeXLive and obscure LaTeX syntax that allowed circumventing Indico's LaTeX sanitizer, it is possible to use specially-crafted LaTeX snippets which can read local files or execute code with the privileges of the user running Indico on the server. Note that if server-side LaTeX rendering is not in use (ie `XELATEX_PATH` was not set in `indico.conf`), this vulnerability does not apply. It is recommended to update to Indico 3.3.12 as soon as possible. It is also strongly recommended to enable the containerized LaTeX renderer (using `podman`), which isolates it from the rest of the system. As a workaround, remove the `XELATEX_PATH` setting from `indico.conf` (or comment it out or set it to `None`) and restart the `indico-uwsgi` and `indico-celery` services to disable LaTeX functionality.
Which versions are affected by CVE-2026-33046?
3 open source packages ship an affected version, including indico. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
indico PyPI | All versions | 3.3.12 |
indico PyPI | All versions | 3.3.12 |
indico PyPI | All versions | 3.3.12 |
Products include Cern Indico.
How do I fix CVE-2026-33046?
Upgrade indico to 3.3.12 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33046 being exploited?
There is no known exploitation of CVE-2026-33046 in the wild and no public exploit code.
Other vulnerabilities in indico
- CVE-2021-30185 Indico Tampering with links (e.g. password reset) in sent emails
- CVE-2026-25738 Indico has Server-Side Request Forgery (SSRF) in multiple places
- CVE-2026-28352 Indico missing access check in event series management API
- CVE-2026-25739 Indico affected by Cross-Site-Scripting via material uploads
- CVE-2023-37901 Cross-Site-Scripting via confirmation prompts
Sources
Also known as GHSA-rm2q-f7jv-3cfp, PYSEC-2026-2184.