Improper Check for Unusual or Exceptional Conditions Affecting libcurl package, versions [8.18.0,8.23.0)
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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Test your applications- Snyk IDSNYK-CONAN-LIBCURL-21195556
- published18 Oct 2026
- disclosed14 Oct 2026
- creditUnknown
Introduced: 14 Oct 2026
NewCVE-2026-86412 (opens in a new tab)How to fix?
Upgrade libcurl to version 8.23.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions when processing an oversized cookie parameter from a remote endpoint in the cookie process. An attacker can cause the loss of session state by serving a specially crafted cookie that triggers the application to reset the storage file upon its next execution. This is only exploitable if the application is explicitly configured to maintain a persistent cookie store across executions.