Access Control Bypass Affecting libcurl package, versions [7.76.0,8.22.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2026
- disclosed6 Sept 2026
- creditUnknown
Introduced: 6 Sep 2026
NewCVE-2026-82209 (opens in a new tab)How to fix?
Upgrade libcurl to version 8.22.0 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass via improper handling of the Set-Cookie header when the Domain attribute matches a public suffix. An attacker can cause cookies to be sent to arbitrary sibling subdomains by setting a cookie with a domain scope that matches a public suffix, leading to potential session hijacking or unauthorized access.