Insertion of Sensitive Information Into Sent Data Affecting libcurl package, versions [8.2.0,8.23.0)
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Test your applications- Snyk IDSNYK-CONAN-LIBCURL-21195975
- published18 Oct 2026
- disclosed14 Oct 2026
- creditUnknown
Introduced: 14 Oct 2026
NewCVE-2026-87863 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade libcurl to version 8.23.0 or higher.
Overview
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the HSTS cache process. An attacker can cause loss of saved strict transport security entries between sessions by sending an out-of-range expiration value from an untrusted HTTPS server, which leads to serialization failure and results in an empty or truncated persistent cache file. This is only exploitable if persistent HSTS caching is enabled.