Description
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
Affected products
haxx: curl
References4
- curl.se/docs/CVE-2026-80231.html MitigationPatchVendor Advisory
- curl.se/docs/CVE-2026-80231.json Vendor Advisory
- hackerone.com/reports/3969368 ExploitMitigationThird Party Advisory
- hackerone.com/reports/3969368 ExploitMitigationThird Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 60 · as of 3 November 2026
- CWE
- CWE-488
Could this be exploited in your environment?
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