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Fencer Intel
high 8.5

CVE-2026-34352 json

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an applicatio…

published 7mo ago modified 4mo ago also EUVD-2026-16468

cvss
8.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

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.

Patch / fix

  • TigerVNC TigerVNC 1.16.2
  • tigervnc Debian 13 1.15.0+dfsg-2.1~deb13u1
  • tigervnc Debian 14 1.15.0+dfsg-2.1

debian advisories DEBIAN-CVE-2026-34352

  • tigervnc RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-icons RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-server RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-license RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-selinux RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-server-module RHEL 9 1.15.0-7.el9_8.1
  • tigervnc-server-minimal RHEL 9 1.15.0-7.el9_8.1
  • tigervnc RHEL 8 1.15.0-9.el8_10

red hat advisories RHSA-2026:24341RHSA-2026:23496RHSA-2026:23254RHSA-2026:23255RHSA-2026:22456RHSA-2026:22424

  • tigervnc SLE Module for Desktop Applications 15 SP7, SLE Module for Basesystem 15 SP7 1.14.1-150700.4.3.1
  • tigervnc SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 1.10.1-150400.7.15.1
  • tigervnc SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 1.12.0-150500.4.3.1
  • tigervnc SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 1.13.1-150600.4.3.1
  • tigervnc SLES for SAP applications 16.0, SLES 16.0 1.15.0-160000.3.1
  • tigervnc SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.6.0-22.23.1

suse advisories SUSE-SU-2026:1360-1SUSE-SU-2026:1303-1SUSE-SU-2026:1302-1SUSE-SU-2026:1301-1SUSE-SU-2026:1252-1SUSE-SU-2026:21140-1

  • tigervnc openSUSE Leap 16.0 1.15.0-160000.3.1
  • tigervnc openSUSE Tumbleweed 1.16.1-2.1

opensuse advisories openSUSE-SU-2026:20465-1openSUSE-SU-2026:10470-1

  • tigervnc AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-icons AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-server AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-license AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-selinux AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-server-module AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc-server-minimal AlmaLinux 9 1.15.0-7.el9_8.1
  • tigervnc AlmaLinux 8 1.15.0-9.el8_10

almalinux advisories ALSA-2026:19342ALSA-2026:13414ALSA-2026:10739

  • tigervnc Rocky Linux 9 1.15.0-7.el9_8.1
  • tigervnc Rocky Linux 8 1.15.0-9.el8_10
  • tigervnc Rocky Linux 9 1.15.0-6.el9_7.1

rocky linux advisories RLSA-2026:19342RLSA-2026:13414RLSA-2026:10739

Is CVE-2026-34352 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-34352 updated cvss 6.3

TigerVNC: x0vncserver: TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions

  • Red Hat Enterprise Linux AppStream (v. 8) tigervnc 1.15.0-9.el8_10, tigervnc-icons 1.15.0-9.el8_10, tigervnc-server 1.15.0-9.el8_10, tigervnc-license 1.15.0-9.el8_10, tigervnc-selinux 1.15.0-9.el8_10, tigervnc-server-module 1.15.0-9.el8_10, +1 more
    fixed: vendor fix RHSA-2026:13414
  • Red Hat Enterprise Linux AppStream (v. 9) tigervnc 1.15.0-6.el9_7.1, tigervnc 1.15.0-7.el9_8.1, tigervnc-icons 1.15.0-6.el9_7.1, tigervnc-icons 1.15.0-7.el9_8.1, tigervnc-server 1.15.0-6.el9_7.1, tigervnc-server 1.15.0-7.el9_8.1, +8 more
    fixed: vendor fix RHSA-2026:10739
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) tigervnc 1.11.0-8.el8_4.15, tigervnc-icons 1.11.0-8.el8_4.15, tigervnc-server 1.11.0-8.el8_4.15, tigervnc-license 1.11.0-8.el8_4.15, tigervnc-selinux 1.11.0-8.el8_4.15, tigervnc-server-module 1.11.0-8.el8_4.15, +1 more
    fixed: vendor fix RHSA-2026:23254
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) tigervnc 1.12.0-6.el8_6.17, tigervnc-icons 1.12.0-6.el8_6.17, tigervnc-server 1.12.0-6.el8_6.17, tigervnc-license 1.12.0-6.el8_6.17, tigervnc-selinux 1.12.0-6.el8_6.17, tigervnc-server-module 1.12.0-6.el8_6.17, +1 more
    fixed: vendor fix RHSA-2026:24341
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) tigervnc 1.12.0-15.el8_8.17, tigervnc-icons 1.12.0-15.el8_8.17, tigervnc-server 1.12.0-15.el8_8.17, tigervnc-license 1.12.0-15.el8_8.17, tigervnc-selinux 1.12.0-15.el8_8.17, tigervnc-server-module 1.12.0-15.el8_8.17, +1 more
    fixed: vendor fix RHSA-2026:23255
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) tigervnc 1.11.0-22.el9_0.17, tigervnc-icons 1.11.0-22.el9_0.17, tigervnc-server 1.11.0-22.el9_0.17, tigervnc-license 1.11.0-22.el9_0.17, tigervnc-selinux 1.11.0-22.el9_0.17, tigervnc-server-module 1.11.0-22.el9_0.17, +1 more
    fixed: vendor fix RHSA-2026:21741
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) tigervnc 1.12.0-14.el9_2.14, tigervnc-icons 1.12.0-14.el9_2.14, tigervnc-server 1.12.0-14.el9_2.14, tigervnc-license 1.12.0-14.el9_2.14, tigervnc-selinux 1.12.0-14.el9_2.14, tigervnc-server-module 1.12.0-14.el9_2.14, +1 more
    fixed: vendor fix RHSA-2026:20576
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) tigervnc 1.13.1-8.el9_4.9, tigervnc-icons 1.13.1-8.el9_4.9, tigervnc-server 1.13.1-8.el9_4.9, tigervnc-license 1.13.1-8.el9_4.9, tigervnc-selinux 1.13.1-8.el9_4.9, tigervnc-server-module 1.13.1-8.el9_4.9, +1 more
    fixed: vendor fix RHSA-2026:20575
show 8 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) tigervnc 1.14.1-10.el9_6, tigervnc-icons 1.14.1-10.el9_6, tigervnc-server 1.14.1-10.el9_6, tigervnc-license 1.14.1-10.el9_6, tigervnc-selinux 1.14.1-10.el9_6, tigervnc-server-module 1.14.1-10.el9_6, +1 more
    fixed: vendor fix RHSA-2026:22424
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) tigervnc 1.11.0-8.el8_4.15, tigervnc-icons 1.11.0-8.el8_4.15, tigervnc-server 1.11.0-8.el8_4.15, tigervnc-license 1.11.0-8.el8_4.15, tigervnc-selinux 1.11.0-8.el8_4.15, tigervnc-server-module 1.11.0-8.el8_4.15, +1 more
    fixed: vendor fix RHSA-2026:23254
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) tigervnc 1.12.0-6.el8_6.17, tigervnc-icons 1.12.0-6.el8_6.17, tigervnc-server 1.12.0-6.el8_6.17, tigervnc-license 1.12.0-6.el8_6.17, tigervnc-selinux 1.12.0-6.el8_6.17, tigervnc-server-module 1.12.0-6.el8_6.17, +1 more
    fixed: vendor fix RHSA-2026:24341
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) tigervnc 1.12.0-15.el8_8.17, tigervnc-icons 1.12.0-15.el8_8.17, tigervnc-server 1.12.0-15.el8_8.17, tigervnc-license 1.12.0-15.el8_8.17, tigervnc-selinux 1.12.0-15.el8_8.17, tigervnc-server-module 1.12.0-15.el8_8.17, +1 more
    fixed: vendor fix RHSA-2026:23255
  • Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) tigervnc 1.1.0-25.el6_10.16, tigervnc-server 1.1.0-25.el6_10.16
    fixed: vendor fix RHSA-2026:23496
  • Red Hat Enterprise Linux Server (v. 7 ELS) tigervnc 1.8.0-36.el7_9.4, tigervnc-icons 1.8.0-36.el7_9.4, tigervnc-server 1.8.0-36.el7_9.4, tigervnc-license 1.8.0-36.el7_9.4, tigervnc-server-minimal 1.8.0-36.el7_9.4
    fixed: vendor fix RHSA-2026:22456
  • Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) tigervnc-server-applet 1.1.0-25.el6_10.16, tigervnc-server-module 1.1.0-25.el6_10.16
    fixed: vendor fix RHSA-2026:23496
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS) tigervnc-server-applet 1.8.0-36.el7_9.4, tigervnc-server-module 1.8.0-36.el7_9.4
    fixed: vendor fix RHSA-2026:22456

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/TigerVNC/tigervnc/issues/2079 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • TigerVNC TigerVNC

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.