CVE-2018-1000840: Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in

Q: How do I fix CVE-2018-1000840?

processing: upgrade to newer than 3.4. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000840 being exploited?

CVE-2018-1000840 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-1000840 affect?

CVE-2018-1000840 affects processing. Severity is medium (CVSS 6.5). Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in loadXML() function that can result in An attacker can read arbitrary files and exfiltrate their contents via HTTP requests. This

Q: How urgent is CVE-2018-1000840?

Priority 48/100. Public exploit reference

This month

MEDIUM 6.5UPGRADE

CVE-2018-1000840 is a medium-severity flaw (CVSS 6.5) affecting processing. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in loadXML() function that can result in An attacker can read arbitrary files and exfiltrate their contents via HTTP requests. This attack appear to be exploitable via The victim must use Processing to parse a crafted XML document.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Weakness	CWE-611
Published	2018-12-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: processing

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

Am I affected?

Timeline

2018-12-20 15:29 UTCPublished CVE record published
2026-06-17 01:33 UTCUpdated Record last modified

processing processing UPGRADE

Affected: <= 3.4

Fixed in: newer than 3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy processing || rpm -q processing || processing --version

2. UPGRADE to newer than 3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade processing

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade processing

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2018-1000840?

processing: upgrade to newer than 3.4. Exact commands for each OS are on this page.

Is CVE-2018-1000840 being exploited?

CVE-2018-1000840 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-2018-1000840 affect?

CVE-2018-1000840 affects processing. Severity is medium (CVSS 6.5). Processing Foundation Processing version 3.4 and earlier contains a XML External Entity (XXE) vulnerability in loadXML() function that can result in An attacker can read arbitrary files and exfiltrate their contents via HTTP requests. This

How urgent is CVE-2018-1000840?

Priority 48/100. Public exploit reference

References

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