8.2

CVE-2026-82209

Exploit

domain-scoped PSL domain cookie

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`).
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Haxx ≫ Curl Version >= 7.46.0 < 8.22.0
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.119
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 8.2 3.9 4.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE-201 Insertion of Sensitive Information Into Sent Data

The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.

https://curl.se/docs/CVE-2026-82209.json
Vendor Advisory
https://curl.se/docs/CVE-2026-82209.html
Patch
Vendor Advisory
https://hackerone.com/reports/3972385
Third Party Advisory
Exploit
Mitigation