CVE-2026-34352
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.25% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 16.4% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-03-26 22:30Z7 MO AGO
- Last updated
- 2026-06-04 14:57Z4 MO AGO
- Reserved
- 2026-03-26
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.5)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
- Weaknesses
- Data version
- 5.2
- Document digest
- 1d3e54cbd66226d95231e6ba1478f48d2d81876bdcd36ba89d9c065d6fccc50c
05 Affected products
06 References
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2026/03/26/7
- github.comhttps://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393
- sourceforge.nethttps://sourceforge.net/projects/tigervnc/files/stable/1.16.2
- groups.google.comhttps://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI
- github.comhttps://github.com/TigerVNC/tigervnc/issues/2079
07 Fixed in
AlmaLinux 8
- tigervnc Fixed in 1.15.0-9.el8_10
- tigervnc-icons Fixed in 1.15.0-9.el8_10
- tigervnc-license Fixed in 1.15.0-9.el8_10
- tigervnc-selinux Fixed in 1.15.0-9.el8_10
- tigervnc-server Fixed in 1.15.0-9.el8_10
- tigervnc-server-minimal Fixed in 1.15.0-9.el8_10
- tigervnc-server-module Fixed in 1.15.0-9.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- tigervnc Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-icons Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-license Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-selinux Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server-minimal Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server-module Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- tigervnc Fixed in 1.15.0-9.el8_10
- tigervnc-icons Fixed in 1.15.0-9.el8_10
- tigervnc-license Fixed in 1.15.0-9.el8_10
- tigervnc-selinux Fixed in 1.15.0-9.el8_10
- tigervnc-server Fixed in 1.15.0-9.el8_10
- tigervnc-server-minimal Fixed in 1.15.0-9.el8_10
- tigervnc-server-module Fixed in 1.15.0-9.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- tigervnc Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-icons Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-license Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-selinux Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server-minimal Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
- tigervnc-server-module Fixed
A version is affected if any line below covers it.
- Affected before 1.15.0-6.el9_7.1
- Affected before 1.15.0-7.el9_8.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- tigervnc No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- tigervnc Fixed in 1.15.0+dfsg-2.1~deb13u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- tigervnc Fixed in 1.15.0+dfsg-2.1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- tigervnc No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.