# CVE-2026-34352: Missing authorization in TigerVNC > Local users can observe or manipulate screen contents and crash the application due to incorrect file permissions in TigerVNC. - **Severity:** High 8.5 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 26 Mar 2026 - **Updated:** 4 Jun 2026 - **Also known as:** CLSA-2026-1776880484, CLSA-2026-1776941944, CLSA-2026-1777056907, DEBIAN-CVE-2026-34352, GHSA-4vj5-vh2w-8g5j, MGASA-2026-0088, OESA-2026-1830, SUSE-SU-2026:1252-1, SUSE-SU-2026:1301-1, SUSE-SU-2026:1302-1, SUSE-SU-2026:1303-1, SUSE-SU-2026:1360-1, SUSE-SU-2026:21140-1, UBUNTU-CVE-2026-34352, openSUSE-SU-2026:10470-1, openSUSE-SU-2026:20465-1 ## What is CVE-2026-34352? CVE-2026-34352 is a high-severity missing authorization vulnerability in TigerVNC, published on 26 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim. ### Official 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. Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource) ## Which versions are affected by CVE-2026-34352? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `tigervnc` | SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | All versions | 1.10.1-150400.7.15.1 | | `tigervnc` | SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | All versions | 1.10.1-150400.7.15.1 | | `tigervnc` | SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | All versions | 1.12.0-150500.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | All versions | 1.12.0-150500.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Module for Basesystem 15 SP7 | All versions | 1.14.1-150700.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 1.14.1-150700.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 1.6.0-22.23.1 | | `tigervnc` | SUSE:Linux Enterprise Server 15 SP4-LTSS | All versions | 1.10.1-150400.7.15.1 | | `tigervnc` | SUSE:Linux Enterprise Server 15 SP5-LTSS | All versions | 1.12.0-150500.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server 15 SP6-LTSS | All versions | 1.13.1-150600.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server 16.0 | All versions | 1.15.0-160000.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.6.0-22.23.1 | | `tigervnc` | SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | All versions | 1.10.1-150400.7.15.1 | | `tigervnc` | SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | All versions | 1.12.0-150500.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | All versions | 1.13.1-150600.4.3.1 | | `tigervnc` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.15.0-160000.3.1 | | `tigervnc` | openSUSE:Leap 15.6 | All versions | 1.13.1-150600.4.3.1 | | `tigervnc` | openSUSE:Leap 16.0 | All versions | 1.15.0-160000.3.1 | | `tigervnc` | openSUSE:Tumbleweed | All versions | 1.16.1-2.1 | Products: Tigervnc Tigervnc. ## How do I fix CVE-2026-34352? Upgrade to a fixed version. ## Is CVE-2026-34352 being exploited? It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34352 exists. ## Other vulnerabilities in TigerVNC - [CVE-2014-0011](https://insights.sbomify.com/CVE-2014-0011/): Memory corruption in TigerVNC (critical 9.8) - [CVE-2017-5581](https://insights.sbomify.com/CVE-2017-5581/): Memory corruption in n/a (critical 9.8) - [CVE-2017-7393](https://insights.sbomify.com/CVE-2017-7393/): Use after free in n/a (high 8.8) - [CVE-2017-7392](https://insights.sbomify.com/CVE-2017-7392/): Denial of service in n/a (high 7.5) - [CVE-2017-7394](https://insights.sbomify.com/CVE-2017-7394/): Denial of service in n/a (high 7.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-34352 and fix it if it is affected. What it is: CVE-2026-34352 is a high-severity missing authorization vulnerability in TigerVNC, published on 26 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34352 exists. Affected product: TigerVNC. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-34352/ (Markdown: https://insights.sbomify.com/CVE-2026-34352/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34352 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34352 - OSV: https://osv.dev/vulnerability/CVE-2026-34352 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-34352/ Summaries are generated and may contain mistakes; the official description above is the record.