CVE-2026-82209
Fixed in a distro release EPSS <1%CVSS 8.2
When libpsl support is enabled, libcurl fails to enforce the Public Suffix List boundary check when processing a `Set-Cookie` header where the `Domain` attribute explicitly matches an origin host that is itself a public suffix (e.g., `Domain=co.uk` set by `co.uk`). Instead of coercing it into a strict host-only cookie, libcurl saves the cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is inappropriately included in subsequent outbound requests or HTTP redirects to arbitrary sibling subdomains under the same public suffix (e.g., `attacker.co.uk`).
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-r2 |
| Chainguard | curl-dev | 8.22.0-r2 |
| Chainguard | curl-doc | 8.22.0-r2 |
| Chainguard | curl-oci-entrypoint | 8.22.0-r2 |
| Chainguard | curl-static | 8.22.0-r2 |
| Chainguard | eco-python-curl | 8.22.0-r1 |
| Chainguard | eco-python-curl-minimal | 8.22.0-r1 |
| Chainguard | eco-python-curl-minimal-bin | 8.22.0-r1 |
| Chainguard | eco-python-curl-minimal-dev | 8.22.0-r1 |
| Chainguard | eco-python-curl-minimal-doc | 8.22.0-r1 |
| Chainguard | eco-python-curl-minimal-static | 8.22.0-r1 |
| Chainguard | eco-python-curl-nghttp2 | 8.22.0-r1 |
| Chainguard | eco-python-curl-nghttp2-bin | 8.22.0-r1 |
| Chainguard | eco-python-curl-nghttp2-dev | 8.22.0-r1 |
| Chainguard | eco-python-curl-nghttp2-static | 8.22.0-r1 |
| Chainguard | libcurl-openssl4 | 8.22.0-r2 |
| Chainguard | libcurl4 | no fix |
| Debian 12 | curl | no fix |
| Debian 13 | curl | no fix |
| Debian 14 | curl | 8.22.0-1 |
| 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 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.29 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.15 |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2.7 |
| Ubuntu 26.10 | curl | 8.20.0-2ubuntu11 |
| Ubuntu Pro 16.04 LTS | curl | 7.47.0-1ubuntu2.19+esm20 |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm14 |
| Ubuntu Pro 20.04 LTS | curl | 7.68.0-1ubuntu2.25+esm9 |
| Wolfi | curl | 8.22.0-r2 |
| Wolfi | curl-dev | 8.22.0-r2 |
| Wolfi | curl-doc | 8.22.0-r2 |
| Wolfi | curl-oci-entrypoint | 8.22.0-r2 |
| Wolfi | curl-static | 8.22.0-r2 |
| Wolfi | libcurl-openssl4 | 8.22.0-r2 |
| Wolfi | libcurl4 | no fix |
| openSUSE Tumbleweed | curl | 8.22.0-1.1 |