CVE catalog
CVE-2020-26117
tigervnc: CVE-2020-26117
- Severity
- Critical · CVSS 9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.06% · Oct 25, 2026
In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | tigervnc | sid | 1.16.2+dfsg-1 | fixed |
| Debian | tigervnc | forky | 1.16.2+dfsg-1 | fixed |
| Debian | tigervnc | trixie | 1.15.0+dfsg-2.1~deb13u1 | fixed |
| Debian | tigervnc | bookworm | 1.12.0+dfsg-8 | fixed |
| Ubuntu | tigervnc | pro | 1.9.0+dfsg-3 | vulnerable |
| Ubuntu | tigervnc | pro | 1.9.0+dfsg-4 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-1 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-2 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-3 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-3ubuntu0.1+esm2 | fixed |
| Ubuntu | tigervnc | 18.04 | 1.7.0+dfsg-7ubuntu1 | vulnerable |
| Ubuntu | tigervnc | 18.04 | 1.7.0+dfsg-8ubuntu2 | vulnerable |
| Ubuntu | tigervnc | pro | 1.9.0+dfsg-3 | vulnerable |
| Ubuntu | tigervnc | pro | 1.9.0+dfsg-4 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-1 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-2 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-3 | vulnerable |
| Ubuntu | tigervnc | pro | 1.10.1+dfsg-3ubuntu0.1+esm2 | fixed |
| Opensuse | tigervnc | leap 15.1 | 1.9.0-lp151.4.9.1 | fixed |
| Suse | tigervnc | hpe helion openstack 8 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | openstack cloud 7 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | openstack cloud 8 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | openstack cloud crowbar 8 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server for sap applications 12 sp2 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server for sap applications 12 sp3 | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp2-ltss | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp2-bcl | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp3-ltss | 1.6.0-27.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp3-bcl | 1.6.0-27.1 | fixed |
| Suse | tigervnc | enterprise storage 5 | 1.6.0-27.1 | fixed |
| Opensuse | tigervnc | leap 15.2 | 1.9.0-lp152.7.3.1 | fixed |
| Suse | tigervnc | linux enterprise high performance computing 15-espos | 1.8.0-13.14.1 | fixed |
| Suse | tigervnc | linux enterprise high performance computing 15-ltss | 1.8.0-13.14.1 | fixed |
| Suse | tigervnc | linux enterprise server 15-ltss | 1.8.0-13.14.1 | fixed |
| Suse | tigervnc | linux enterprise server for sap applications 15 | 1.8.0-13.14.1 | fixed |
| Suse | tigervnc | openstack cloud 9 | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | openstack cloud crowbar 9 | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | linux enterprise server for sap applications 12 sp4 | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp4-ltss | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | linux enterprise server 12 sp5 | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | linux enterprise server for sap applications 12 sp5 | 1.6.0-22.17.1 | fixed |
| Suse | tigervnc | linux enterprise module for basesystem 15 sp1 | 1.9.0-19.9.1 | fixed |
| Suse | tigervnc | linux enterprise module for basesystem 15 sp2 | 1.9.0-19.9.1 | fixed |
| Suse | tigervnc | linux enterprise module for desktop applications 15 sp1 | 1.9.0-19.9.1 | fixed |
| Suse | tigervnc | linux enterprise module for desktop applications 15 sp2 | 1.9.0-19.9.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | tigervnc | source | sid | 1.10.1+dfsg-9 | not yet assigned | Not reported | [971272] |
| Debian | tigervnc | source | forky | 1.10.1+dfsg-9 | not yet assigned | Not reported | [971272] |
| Debian | tigervnc | source | trixie | 1.10.1+dfsg-9 | not yet assigned | Not reported | [971272] |
| Debian | tigervnc | source | bookworm | 1.10.1+dfsg-9 | not yet assigned | Not reported | [971272] |
| Ubuntu | tigervnc | deb | pro | 1.10.1+dfsg-3ubuntu0.1+esm2 | Not reported | USN-5965-1 | Not reported |
| Ubuntu | tigervnc | deb | pro | 1.10.1+dfsg-3ubuntu0.1+esm2 | Not reported | UBUNTU-CVE-2020-26117 | Not reported |
| Opensuse | tigervnc | rpm | leap 15.1 | 1.9.0-lp151.4.9.1 | Not reported | OPENSUSE-SU-2020:1841-1 | Not reported |
| Suse | tigervnc | rpm | hpe helion openstack 8 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | openstack cloud 7 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | openstack cloud 8 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | openstack cloud crowbar 8 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server for sap applications 12 sp2 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server for sap applications 12 sp3 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp2-ltss | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp2-bcl | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp3-ltss | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp3-bcl | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Suse | tigervnc | rpm | enterprise storage 5 | 1.6.0-27.1 | Not reported | SUSE-SU-2020:2898-1 | Not reported |
| Opensuse | tigervnc | rpm | leap 15.2 | 1.9.0-lp152.7.3.1 | Not reported | OPENSUSE-SU-2020:1666-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise high performance computing 15-espos | 1.8.0-13.14.1 | Not reported | SUSE-SU-2020:2882-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise high performance computing 15-ltss | 1.8.0-13.14.1 | Not reported | SUSE-SU-2020:2882-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 15-ltss | 1.8.0-13.14.1 | Not reported | SUSE-SU-2020:2882-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server for sap applications 15 | 1.8.0-13.14.1 | Not reported | SUSE-SU-2020:2882-1 | Not reported |
| Suse | tigervnc | rpm | openstack cloud 9 | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | openstack cloud crowbar 9 | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server for sap applications 12 sp4 | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp4-ltss | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server 12 sp5 | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise server for sap applications 12 sp5 | 1.6.0-22.17.1 | Not reported | SUSE-SU-2020:2881-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise module for basesystem 15 sp1 | 1.9.0-19.9.1 | Not reported | SUSE-SU-2020:2880-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise module for basesystem 15 sp2 | 1.9.0-19.9.1 | Not reported | SUSE-SU-2020:2880-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise module for desktop applications 15 sp1 | 1.9.0-19.9.1 | Not reported | SUSE-SU-2020:2880-1 | Not reported |
| Suse | tigervnc | rpm | linux enterprise module for desktop applications 15 sp2 | 1.9.0-19.9.1 | Not reported | SUSE-SU-2020:2880-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [tigervnc-common]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
- [tigervnc-scraping-server]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
- [tigervnc-standalone-server]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
- [tigervnc-tools]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
- [tigervnc-viewer]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
- [tigervnc-xorg-extension]Fixed
Source package: [tigervnc]
Details (2)
1.12.0+dfsg-8· amd64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
1.12.0+dfsg-8· arm64 · bookwormFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · bookworm; dsa · tigervnc · debian · 12
[Debian 13 (Trixie)]
- [tigervnc-common]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
- [tigervnc-scraping-server]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
- [tigervnc-standalone-server]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
- [tigervnc-tools]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
- [tigervnc-viewer]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
- [tigervnc-xorg-extension]Fixed
Source package: [tigervnc]
Details (2)
1.15.0+dfsg-2.1~deb13u1· amd64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
1.15.0+dfsg-2.1~deb13u1· arm64 · trixieFixed · Fixed:
1.10.1+dfsg-9dsa · tigervnc · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2021:1783]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2021_1783.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-26117]
- [https://osv.dev/vulnerability/DLA-2396-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:2880-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:2881-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:2882-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:2898-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-26117]
- [https://osv.dev/vulnerability/USN-5965-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:1666-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:1841-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-26117]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2023-0694.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]