Insertion of Sensitive Information Into Sent Data Affecting libcurl package, versions [8.2.0,8.23.0)
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-21195975
- published18 Oct 2026
- disclosed14 Oct 2026
- creditUnknown
Introduced: 14 Oct 2026
NewCVE-2026-87863 (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 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.