What is CVE-2026-33046?

CVE-2026-33046 is a high-severity vulnerability in Cern Indico, classified under Path Traversal. CVSS score: 8.8/10. Published 2026-03-23.

How severe is CVE-2026-33046?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Cern Indico

CVE-2026-33046

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.010 · change: +0.002

Affected products

Cern Indico
Indico — versions < 3.3.12

Weakness classification (CWE)

References

github.com/indico/indico/security/advisories/GHSA-rm2q-f7jv-3cfp (Patch, Mitigation, Vendor Advisory)
github.com/indico/indico/commit/0adb70f0ed66e129361d447868f5f3eb90dc5e96 (Patch)
github.com/indico/indico/commit/1dbb12525b3de14229bf4d1ae192988068f975f6 (Patch)
github.com/indico/indico/commit/5f24d23ce9c4b0e4b68b3d0b58987a948fc57c8a (Patch)
github.com/indico/indico/commit/fb169ced710c30cf792ce4b9f48688db0633cfd8 (Patch)
github.com/indico/indico/releases/tag/v3.3.12 (Product, Release Notes)

Frequently asked questions

What is CVE-2026-33046?: CVE-2026-33046 is a high-severity vulnerability in Cern Indico, classified under Path Traversal. CVSS score: 8.8/10. Published 2026-03-23.
How severe is CVE-2026-33046?: High severity. CVSS v3 base score is 8.8 out of 10.