CVE-2026-33046Network attack vector

Authenticated code execution via LaTeX sanitizer bypass

Published Mar 23, 2026 · Updated Mar 23, 2026

LaTeX injection in CERN Indico before 3.3.12 allows remote authenticated users to read local files or execute server-side code. The math-mode sanitizer in indico/util/mdx_latex.py fails to normalize TeX caret-encoded backslashes before validating commands, so crafted syntax reaches TeXLive as executable LaTeX. Exploitation requires an account and server-side LaTeX rendering configured through XELATEX_PATH; successful code runs with the Indico service user's privileges.

CVSS severity7.7
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

LaTeX injection in CERN Indico before 3.3.12 allows remote authenticated users to read local files or execute server-side code. The math-mode sanitizer in indico/util/mdx_latex.py fails to normalize TeX caret-encoded backslashes before validating commands, so crafted syntax reaches TeXLive as executable LaTeX. Exploitation requires an account and server-side LaTeX rendering configured through XELATEX_PATH; successful code runs with the Indico service user's privileges.

The record

CVE
CVE-2026-33046
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
CERN
Product
Indico
Classifications
CWE-22, CWE-78, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.3.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CERN · Indicoversion=< 3.3.12

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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