CVE-2026-34352: In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen con

Q: How do I fix CVE-2026-34352?

tigervnc: upgrade to 1.16.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-34352 being exploited?

CVE-2026-34352 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-2026-34352 affect?

CVE-2026-34352 affects tigervnc. Severity is high (CVSS 8.5). In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

Routine

HIGH 8.5UPGRADE

CVE-2026-34352 is a high-severity flaw (CVSS 8.5) affecting tigervnc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-732
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tigervnc

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

Am I affected?

Timeline

2026-03-26 23:16 UTCPublished CVE record published
2026-06-17 10:38 UTCUpdated Record last modified

tigervnc tigervnc UPGRADE

Affected: < 1.16.2

Fixed in: 1.16.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.16.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tigervnc

Note

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

Advisories and coverage

Official advisories

AlmaLinux Errata: [ALSA-2026:19342] Important: tigervnc security update 2026-06-24

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-2026-34352?

tigervnc: upgrade to 1.16.2. Exact commands for each OS are on this page.

Is CVE-2026-34352 being exploited?

CVE-2026-34352 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-2026-34352 affect?

CVE-2026-34352 affects tigervnc. Severity is high (CVSS 8.5). In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

How urgent is CVE-2026-34352?

Priority 34/100. High severity

References

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