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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:cern:indico:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-23 23:17

Updated : 2026-03-24 21:51

NVD link : CVE-2026-33046

Mitre link : CVE-2026-33046

CVE.ORG link : CVE-2026-33046

JSON object : View

Products Affected

cern

indico

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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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."}, {"lang": "es", "value": "Indico es un sistema de gesti\u00f3n de eventos que utiliza Flask-Multipass, un sistema de autenticaci\u00f3n multi-backend para Flask. En versiones anteriores a la 3.3.12, debido a vulnerabilidades en TeXLive y sintaxis LaTeX oscura que permit\u00eda eludir el saneador LaTeX de Indico, es posible utilizar fragmentos LaTeX especialmente dise\u00f1ados que pueden leer archivos locales o ejecutar c\u00f3digo con los privilegios del usuario que ejecuta Indico en el servidor. Tenga en cuenta que si la renderizaci\u00f3n LaTeX del lado del servidor no est\u00e1 en uso (es decir, 'XELATEX_PATH' no se configur\u00f3 en 'indico.conf'), esta vulnerabilidad no se aplica. Se recomienda actualizar a Indico 3.3.12 lo antes posible. Tambi\u00e9n se recomienda encarecidamente habilitar el renderizador LaTeX en contenedores (utilizando 'podman'), que lo a\u00edsla del resto del sistema. Como soluci\u00f3n alternativa, elimine la configuraci\u00f3n de 'XELATEX_PATH' de 'indico.conf' (o com\u00e9ntela o config\u00farela como 'None') y reinicie los servicios 'indico-uwsgi' e 'indico-celery' para deshabilitar la funcionalidad LaTeX."}], "lastModified": "2026-03-24T21:51:13.703", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cern:indico:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CC85A72D-556A-4CB4-930A-68C3B1B9F8B0", "versionEndExcluding": "3.3.12"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}