CVE-2026-3778: The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF

Q: How do I fix CVE-2026-3778?

pdf editor: upgrade to newer than 2025.3.0.69570; pdf reader: upgrade to newer than 2025.3.0.69570. Exact commands for each OS are on this page.

Q: Is CVE-2026-3778 being exploited?

CVE-2026-3778 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-2026-3778 affect?

CVE-2026-3778 affects pdf editor, pdf reader. Severity is medium (CVSS 6.2). The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF. When pages and annotations are crafted that reference each other in a loop, passing the document to APIs (e.g., SOAP) that perfo

Q: How urgent is CVE-2026-3778?

Priority 22/100. No elevated risk signals yet.

Routine

MEDIUM 6.2UPGRADEUPGRADE

CVE-2026-3778 is a medium-severity flaw (CVSS 6.2) affecting pdf editor, pdf reader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF. When pages and annotations are crafted that reference each other in a loop, passing the document to APIs (e.g., SOAP) that perform deep traversal can cause uncontrolled recursion, stack exhaustion, and application crashes.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-674
Published	2026-04-01
Last modified	2026-06-17

Publisher (CNA): Foxit · Vendor: foxit

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

Am I affected?

Timeline

2026-04-01 02:16 UTCPublished CVE record published
2026-06-17 10:44 UTCUpdated Record last modified

foxit pdf editor UPGRADE

Affected: <= 13.2.2.24014 · >= 14.0.0.33046 and <= 14.0.2.33402 · >= 2023.1.0.15510 and <= 2023.3.0.23028 · >= 2024.1.0.23997 and <= 2024.4.1.27687 · >= 2025.1.0.27937 and <= 2025.3.0.35737 · <= 13.2.2.63349 · >= 14.0.0.68868 and <= 14.0.2.69164 · >= 2023.1.0.55583 and <= 2023.3.0.63083

Fixed in: newer than 2025.3.0.69570

Safe to downgrade to: a release before 14.0.0.33046

1. Check installed version

apt-cache policy pdf-editor || rpm -q pdf-editor || pdf-editor --version

2. UPGRADE to newer than 2025.3.0.69570 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pdf-editor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pdf-editor

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 14.0.0.33046 (Debian / Ubuntu)

apt-cache madison pdf-editor sudo apt install pdf-editor=<VERSION_BEFORE_14.0.0.33046> sudo apt-mark hold pdf-editor

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pdf-editor sudo dnf downgrade pdf-editor-<VERSION_BEFORE_14.0.0.33046> sudo dnf versionlock add pdf-editor

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.

foxit pdf reader UPGRADE

Affected: <= 2025.3.0.35737 · <= 2025.3.0.69570

Fixed in: newer than 2025.3.0.69570

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pdf-reader || rpm -q pdf-reader || pdf-reader --version

2. UPGRADE to newer than 2025.3.0.69570 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pdf-reader

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pdf-reader

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-2026-3778?

pdf editor: upgrade to newer than 2025.3.0.69570; pdf reader: upgrade to newer than 2025.3.0.69570. Exact commands for each OS are on this page.

Is CVE-2026-3778 being exploited?

CVE-2026-3778 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-2026-3778 affect?

CVE-2026-3778 affects pdf editor, pdf reader. Severity is medium (CVSS 6.2). The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF. When pages and annotations are crafted that reference each other in a loop, passing the document to APIs (e.g., SOAP) that perfo

How urgent is CVE-2026-3778?

Priority 22/100. No elevated risk signals yet.

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References

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