CVE-2026-5943: Document structural anomalies caused inconsistencies between page element relationships and internal index sta

Q: How do I fix CVE-2026-5943?

pdf editor: upgrade to 13.2.4, 14.0.4, 2026.1.1; pdf reader: upgrade to 2026.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-5943 being exploited?

CVE-2026-5943 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-2026-5943 affect?

CVE-2026-5943 affects pdf editor, pdf reader. Severity is high (CVSS 7.8). Document structural anomalies caused inconsistencies between page element relationships and internal index states. When scripts triggered document modifications, object reference validity was not properly maintained, leading to a crash when

Routine

HIGH 7.8UPGRADEUPGRADE

CVE-2026-5943 is a high-severity flaw (CVSS 7.8) affecting pdf editor, pdf reader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Document structural anomalies caused inconsistencies between page element relationships and internal index states. When scripts triggered document modifications, object reference validity was not properly maintained, leading to a crash when accessing an invalid pointer during page information queries.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-04-27
Last modified	2026-10-26

Publisher (CNA): Foxit · Vendor: foxit

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-27 12:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

foxit pdf editor UPGRADE

Affected: < 13.2.4 · >= 14.0.0 and < 14.0.4 · >= 2023.0.0 and < 2026.1.1

Fixed in: 13.2.4, 14.0.4, 2026.1.1

Safe to downgrade to: a release before 14.0.0

1. Check installed version

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

2. UPGRADE to 13.2.4 (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 (Debian / Ubuntu)

apt-cache madison pdf-editor sudo apt install pdf-editor=<VERSION_BEFORE_14.0.0> 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> 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: < 2026.1.1

Fixed in: 2026.1.1

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 2026.1.1 (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-2026-5943?

pdf editor: upgrade to 13.2.4, 14.0.4, 2026.1.1; pdf reader: upgrade to 2026.1.1. Exact commands for each OS are on this page.

Is CVE-2026-5943 being exploited?

CVE-2026-5943 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-2026-5943 affect?

CVE-2026-5943 affects pdf editor, pdf reader. Severity is high (CVSS 7.8). Document structural anomalies caused inconsistencies between page element relationships and internal index states. When scripts triggered document modifications, object reference validity was not properly maintained, leading to a crash when

How urgent is CVE-2026-5943?

Priority 29/100. High severity

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References

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