Description
An Uncontrolled Search Path Element vulnerability in the OpenSSL TLS backend of Qt Network (qtbase) in Qt Qt Framework (Unix) allows a local attacker to load a rogue CA certificate as a trusted system authority via a crafted certificate file placed in the application's working directory.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Qt | Qt | 5.0.0 – ≤ 5.15.19, 6.0.0 – ≤ 6.5.9, 6.6.0 – ≤ 6.8.3, 6.9.0 – ≤ 6.9.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qt6-base +2 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-base +2 | No fix yet | — |
| Ubuntu 25.10 | qt6-base +2 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-base +1 | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-base +1 | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu 16.04 LTS | qtbase-opensource-src-gles | No fix yet | — |
| Ubuntu Pro 24.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 22.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 20.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 18.04 LTS | qtbase-opensource-src | No fix yet | — |
| Ubuntu Pro 16.04 LTS | qtbase-opensource-src | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | libqt4 +2 | 4.8.7-8.25.1 | SUSE-SU-2026:3116-1 |
Advisories 2
- WID-SEC-2026-1592 QT: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jul 19, 2026
- SUSE-SU-2026:3116-1 Security update for libqt4 SUSE / openSUSE Security Updates · Jul 18, 2026