CVE-2026-80231

7.5 highEPSS 0.9%

High (7.5) in haxx curl. EPSS 0.9% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-488
Published: 2026-09-06
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

Affected

haxx:curl

References

https://curl.se/docs/CVE-2026-80231.html
https://curl.se/docs/CVE-2026-80231.json
https://hackerone.com/reports/3969368
https://hackerone.com/reports/3969368

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