CVE-2026-85618Public exploitNetwork attack vectorHinoki check available

Authenticated file read via unsandboxed LaTeX directives

Published Sep 4, 2026 · Updated Sep 4, 2026

Path traversal in C4illin ConvertX 0 through 0.18.0 allows remote authenticated users to read server files through crafted LaTeX uploads. The xelatex converter passes the uploaded file to latexmk without inspecting its contents or sandboxing TeX, so input directives read server paths into the downloadable PDF. A valid account is required, and exposure is limited to files readable by the server process, which runs as root in the default container.

CVSS severity7.1
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in C4illin ConvertX 0 through 0.18.0 allows remote authenticated users to read server files through crafted LaTeX uploads. The xelatex converter passes the uploaded file to latexmk without inspecting its contents or sandboxing TeX, so input directives read server paths into the downloadable PDF. A valid account is required, and exposure is limited to files readable by the server process, which runs as root in the default container.

The record

CVE
CVE-2026-85618
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
C4illin
Product
ConvertX
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=0 <=0.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

C4illin · ConvertXversion=0 <=0.18.0

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

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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