CVE-2026-8932
Fixed in a distro release EPSS <1%CVSS 7.5
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
Products: curl
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | curl | 8.12.1-4.el10_2.6 |
| AlmaLinux 10 | libcurl | 8.12.1-4.el10_2.6 |
| AlmaLinux 10 | libcurl-devel | 8.12.1-4.el10_2.6 |
| AlmaLinux 10 | libcurl-minimal | 8.12.1-4.el10_2.6 |
| Alpine 3.23 | curl | 8.22.0-r0 |
| Alpine 3.24 | curl | 8.21.0-r0 |
| Chainguard | eco-python-curl | 8.21.0-r0 |
| Chainguard | eco-python-curl-minimal | 8.21.0-r0 |
| Chainguard | eco-python-curl-minimal-bin | 8.21.0-r0 |
| Chainguard | eco-python-curl-minimal-dev | 8.21.0-r0 |
| Chainguard | eco-python-curl-minimal-doc | 8.21.0-r0 |
| Chainguard | eco-python-curl-minimal-static | 8.21.0-r0 |
| Chainguard | eco-python-curl-nghttp2 | 8.21.0-r0 |
| Chainguard | eco-python-curl-nghttp2-bin | 8.21.0-r0 |
| Chainguard | eco-python-curl-nghttp2-dev | 8.21.0-r0 |
| Chainguard | eco-python-curl-nghttp2-static | 8.21.0-r0 |
| Chainguard | libcurl4 | no fix |
| Debian 12 | curl | no fix |
| Debian 13 | curl | no fix |
| Debian 14 | curl | 8.21.0~rc2-1 |
| Red Hat Enterprise Linux 10.2 | curl | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | curl-debuginfo | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | curl-debugsource | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libcurl | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libcurl-debuginfo | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libcurl-devel | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libcurl-minimal | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libcurl-minimal-debuginfo | 0:8.12.1-4.el10_2.6 |
| Red Hat Enterprise Linux eus 10.0 | curl | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | curl-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | curl-debugsource | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-devel | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-minimal | 0:8.12.1-1.el10_0.10 |
| Red Hat Enterprise Linux eus 10.0 | libcurl-minimal-debuginfo | 0:8.12.1-1.el10_0.10 |
| Red Hat hummingbird 1 | cargo | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | clippy | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | curl | 0:8.21.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.21.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.21.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.21.0-0.1.hum1 |
| Red Hat hummingbird 1 | rust | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-analyzer | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-debugger-common | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-doc | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-gdb | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-lldb | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-src | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-aarch64-unknown-none-softfloat | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-aarch64-unknown-uefi | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-i686-pc-windows-gnu | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-wasm32-unknown-unknown | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-wasm32-wasip1 | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-pc-windows-gnu | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-unknown-none | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rust-std-static-x86_64-unknown-uefi | 0:1.96.1-1.hum1 |
| Red Hat hummingbird 1 | rustfmt | 0:1.96.1-1.hum1 |
| Rocky Linux 10 | curl | 0:8.12.1-4.el10_2.6 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.27 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.13 |
| Ubuntu 25.10 | curl | no fix |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2.5 |
| Ubuntu Pro 14.04 LTS | curl | no fix |
| Ubuntu Pro 16.04 LTS | curl | no fix |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm12 |
| Ubuntu Pro 20.04 LTS | curl | 7.68.0-1ubuntu2.25+esm7 |
| Wolfi | libcurl4 | no fix |
| openSUSE Tumbleweed | curl | 8.21.0-1.1 |