CVE-2026-19931
Fixed in a distro release EPSS 1%CVSS 9.8
A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection.
Products: curl
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.23 | curl | 8.22.0-r0 |
| Alpine 3.24 | curl | 8.22.0-r0 |
| Chainguard | curl | 8.22.0-r0 |
| Chainguard | libcurl4 | no fix |
| Debian 12 | curl | no fix |
| Debian 13 | curl | no fix |
| Debian 14 | curl | 8.22.0~rc2-1 |
| Red Hat hummingbird 1 | cargo | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | clippy | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | curl | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | rust | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-analyzer | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-debugger-common | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-doc | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-gdb | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-lldb | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-src | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-aarch64-unknown-none-softfloat | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-aarch64-unknown-uefi | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-i686-pc-windows-gnu | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-wasm32-unknown-unknown | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-wasm32-wasip1 | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-pc-windows-gnu | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-unknown-none | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-unknown-uefi | 0:1.98.0-1.hum1 |
| Red Hat hummingbird 1 | rustfmt | 0:1.98.0-1.hum1 |
| Ubuntu 22.04 LTS | curl | no fix |
| Ubuntu 24.04 LTS | curl | no fix |
| Ubuntu 26.04 LTS | curl | no fix |
| Ubuntu Pro 20.04 LTS | curl | no fix |
| Wolfi | curl | 8.22.0-r0 |
| Wolfi | libcurl4 | no fix |
| openSUSE Tumbleweed | curl | 8.22.0-1.1 |