CVE-2026-8286

8.1 highEPSS 0.3%

High (8.1) in haxx curl. EPSS 0.3% chance of exploitation in the next 30 days.

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

Severity

CVSS 3.1

8.1 high

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2026-07-03
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

Affected

haxx:curl

References

https://curl.se/docs/CVE-2026-8286.html
https://curl.se/docs/CVE-2026-8286.json
https://hackerone.com/reports/3718195
https://hackerone.com/reports/3718195

Check your stack JSON