CVE-2026-5940: Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated o

Q: How do I fix CVE-2026-5940?

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-2026-5940 being exploited?

CVE-2026-5940 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-2026-5940 affect?

CVE-2026-5940 affects pdf editor, pdf reader. Severity is high (CVSS 7.8). Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated object, leading to program crashes.

Routine

HIGH 7.8UPGRADEUPGRADE

CVE-2026-5940 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.

Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated object, leading to program crashes.

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 94%)
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-2026-5940?

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-2026-5940 being exploited?

CVE-2026-5940 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-2026-5940 affect?

CVE-2026-5940 affects pdf editor, pdf reader. Severity is high (CVSS 7.8). Calling a function that triggers a UI refresh after removing comments via a script may access an invalidated object, leading to program crashes.

How urgent is CVE-2026-5940?

Priority 29/100. High severity

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References

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