Vulnerability · Published Oct 23, 2026 · Assigned by Qt
CVE-2026-95620Use-after-free vulnerability in QNetworkAccessManager HTTP/2 support impacts Qt
Low 2.1
In plain English
A low-severity use-after-free in qt from qt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 4.0)2.1Low
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A use-after-free vulnerability in the Qt QNetworkAccessManager HTTP/2 client support of the Qt Network module allows a malicious or compromised HTTP/2 server to cause the client application to crash, affecting availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | qt6-base | no fix listed | DEBIAN-CVE-2026-95620 |
| Ubuntu:22.04:LTS | qt6-base | no fix listed | UBUNTU-CVE-2026-95620 |
| Ubuntu:24.04:LTS | qt6-base | no fix listed | UBUNTU-CVE-2026-95620 |
| Ubuntu:26.04:LTS | qt6-base | no fix listed | UBUNTU-CVE-2026-95620 |
| Ubuntu:26.10 | qt6-base | no fix listed | UBUNTU-CVE-2026-95620 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/RE:L/U:Green