Indico discloses local files resulting in Remote Code Execution through LaTeX injection
[!NOTE] If server-side LaTeX rendering is not in use (ie
XELATEX_PATHwas not set inindico.conf), this vulnerability does not apply.
Impact
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.
Patches
It is recommended to update to Indico 3.3.12 as soon as possible. See the docs for instructions on how to update.
It is also strongly recommended to enable the containerized LaTeX renderer (using podman), which isolates it from the rest of the system. See the docs for details - it is very easy and from now on the only recommended/supported way of using LaTeX.
Workarounds
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.
For more information
For any questions or comments about this advisory:
- Open a thread in the forum
- Send an email to indico-team@cern.ch
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | indico | < 3.3.12 | 3.3.12 |
References
- https://github.com/indico/indico/releases/tag/v3.3.12
- https://github.com/indico/indico/commit/0adb70f0ed66e129361d447868f5f3eb90dc5e96
- https://github.com/indico/indico/commit/1dbb12525b3de14229bf4d1ae192988068f975f6
- https://github.com/indico/indico/commit/5f24d23ce9c4b0e4b68b3d0b58987a948fc57c8a
- https://github.com/indico/indico/commit/fb169ced710c30cf792ce4b9f48688db0633cfd8
- https://github.com/indico/indico/security/advisories/GHSA-rm2q-f7jv-3cfp
- https://nvd.nist.gov/vuln/detail/CVE-2026-33046
- https://github.com/indico/indico
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-22, CWE-78- Platform
- Python (PyPI)
- Package
indico- Disclosed
- 23.03.2026
- Updated
- 11.10.2026 14:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2184 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-rm2q-f7jv-3cfp - CC BY 4.0
Vulnerability history: indico
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 16
- First → latest
- 10.2019 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 13
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 1
- 2025: 4
- 2026: 8
-
Indico discloses local files resulting in Remote Code Execution through LaTeX injection this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.