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CVE-2023-32668: LuaTeX before 1.17.0 allows a document (compiled with the default settings) to make arbitrary network requests

32
Routine
MEDIUM 5.5UPGRADEUPGRADEUPGRADE

CVE-2023-32668 is a medium-severity flaw (CVSS 5.5) affecting luatex, miktex, tex live. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LuaTeX before 1.17.0 allows a document (compiled with the default settings) to make arbitrary network requests. This occurs because full access to the socket library is permitted by default, as stated in the documentation. This also affects TeX Live before 2023 r66984 and MiKTeX before 23.5.

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.4% (top 69%)
CISA exploited listNo
Published2023-05-11
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: luatex project · miktex · tug

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

luatex project luatex UPGRADE
Affected: >= 0.27.0 and < 1.17.0
Fixed in: 1.17.0
Safe to downgrade to: a release before 0.27.0
1. Check installed version
apt-cache policy luatex || rpm -q luatex || luatex --version
2. UPGRADE to 1.17.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade luatex
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade luatex
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 0.27.0 (Debian / Ubuntu)
apt-cache madison luatex sudo apt install luatex=<VERSION_BEFORE_0.27.0> sudo apt-mark hold luatex
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list luatex sudo dnf downgrade luatex-<VERSION_BEFORE_0.27.0> sudo dnf versionlock add luatex
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
miktex miktex UPGRADE
Affected: >= 2.9.0 and < 23.5
Fixed in: 23.5
Safe to downgrade to: a release before 2.9.0
1. Check installed version
apt-cache policy miktex || rpm -q miktex || miktex --version
2. UPGRADE to 23.5 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade miktex
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade miktex
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 2.9.0 (Debian / Ubuntu)
apt-cache madison miktex sudo apt install miktex=<VERSION_BEFORE_2.9.0> sudo apt-mark hold miktex
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list miktex sudo dnf downgrade miktex-<VERSION_BEFORE_2.9.0> sudo dnf versionlock add miktex
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
tug tex live UPGRADE
Affected: >= 2009 and < 2023
Fixed in: 2023
Safe to downgrade to: a release before 2009
1. Check installed version
apt-cache policy tex-live || rpm -q tex-live || tex-live --version
2. UPGRADE to 2023 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tex-live
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tex-live
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 2009 (Debian / Ubuntu)
apt-cache madison tex-live sudo apt install tex-live=<VERSION_BEFORE_2009> sudo apt-mark hold tex-live
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list tex-live sudo dnf downgrade tex-live-<VERSION_BEFORE_2009> sudo dnf versionlock add tex-live
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-32668?

luatex: upgrade to 1.17.0; miktex: upgrade to 23.5; tex live: upgrade to 2023. Exact commands for each OS are on this page.

Is CVE-2023-32668 being exploited?

CVE-2023-32668 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-32668 affect?

CVE-2023-32668 affects luatex, miktex, tex live. Severity is medium (CVSS 5.5). LuaTeX before 1.17.0 allows a document (compiled with the default settings) to make arbitrary network requests. This occurs because full access to the socket library is permitted by default, as stated in the documentation. This also affects

How urgent is CVE-2023-32668?

Priority 32/100. Public exploit reference

Related CVEs

References

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