---
title: "CVE-2026-34352\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-34352?format=md
keywords: index, follow
---

# CVE-2026-34352

Publication date 26 March 2026

Last updated 1 April 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**8.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2026-34352?format=md#impact-score)

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## Description

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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tigervnc | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Changed |
  | Confidentiality impact | High |
  | Integrity impact | Low |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34352)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-34352)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-34352)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-34352)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-34352>
* <https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI>
* <https://www.openwall.com/lists/oss-security/2026/03/26/7>
* <https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393>
* <https://sourceforge.net/projects/tigervnc/files/stable/1.16.2>