# CVE-2026-8286

## Summary

- **CVE ID:** CVE-2026-8286
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-295
- **Published:** Jul 3, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- curl — curl (8.20.0)
- curl — curl (8.19.0)
- curl — curl (8.18.0)
- curl — curl (8.17.0)
- curl — curl (8.16.0)
- curl — curl (8.15.0)
- curl — curl (8.14.1)
- curl — curl (8.14.0)
- curl — curl (8.13.0)
- curl — curl (8.12.1)
- curl — curl (8.12.0)
- curl — curl (8.11.1)
- curl — curl (8.11.0)
- curl — curl (8.10.1)
- curl — curl (8.10.0)
- curl — curl (8.9.1)
- curl — curl (8.9.0)
- curl — curl (8.8.0)
- curl — curl (8.7.1)
- curl — curl (8.7.0)
- curl — curl (8.6.0)
- curl — curl (8.5.0)
- curl — curl (8.4.0)
- curl — curl (8.3.0)
- curl — curl (8.2.1)
- curl — curl (8.2.0)
- curl — curl (8.1.2)
- curl — curl (8.1.1)
- curl — curl (8.1.0)
- curl — curl (8.0.1)
- curl — curl (8.0.0)
- curl — curl (7.88.1)
- curl — curl (7.88.0)
- curl — curl (7.87.0)
- curl — curl (7.86.0)
- curl — curl (7.85.0)
- curl — curl (7.84.0)
- curl — curl (7.83.1)
- curl — curl (7.83.0)
- curl — curl (7.82.0)
- curl — curl (7.81.0)
- curl — curl (7.80.0)
- curl — curl (7.79.1)
- curl — curl (7.79.0)
- curl — curl (7.78.0)
- curl — curl (7.77.0)
- curl — curl (7.76.1)
- curl — curl (7.76.0)
- curl — curl (7.75.0)
- curl — curl (7.74.0)
- curl — curl (7.73.0)
- curl — curl (7.72.0)
- curl — curl (7.71.1)
- curl — curl (7.71.0)
- curl — curl (7.70.0)
- curl — curl (7.69.1)
- curl — curl (7.69.0)
- curl — curl (7.68.0)
- curl — curl (7.67.0)
- curl — curl (7.66.0)
- curl — curl (7.65.3)
- curl — curl (7.65.2)
- curl — curl (7.65.1)
- curl — curl (7.65.0)
- curl — curl (7.64.1)
- curl — curl (7.64.0)
- curl — curl (7.63.0)
- curl — curl (7.62.0)
- curl — curl (7.61.1)
- curl — curl (7.61.0)
- curl — curl (7.60.0)
- curl — curl (7.59.0)
- curl — curl (7.58.0)
- curl — curl (7.57.0)
- curl — curl (7.56.1)
- curl — curl (7.56.0)
- curl — curl (7.55.1)
- curl — curl (7.55.0)
- curl — curl (7.54.1)
- curl — curl (7.54.0)
- curl — curl (7.53.1)
- curl — curl (7.53.0)
- curl — curl (7.52.1)
- curl — curl (7.52.0)
- curl — curl (7.51.0)
- curl — curl (7.50.3)
- curl — curl (7.50.2)
- curl — curl (7.50.1)
- curl — curl (7.50.0)
- curl — curl (7.49.1)
- curl — curl (7.49.0)
- curl — curl (7.48.0)
- curl — curl (7.47.1)
- curl — curl (7.47.0)
- curl — curl (7.46.0)
- curl — curl (7.45.0)
- curl — curl (7.44.0)
- curl — curl (7.43.0)
- curl — curl (7.42.1)
- curl — curl (7.42.0)
- curl — curl (7.41.0)
- curl — curl (7.40.0)
- curl — curl (7.39.0)
- curl — curl (7.38.0)
- curl — curl (7.37.1)
- curl — curl (7.37.0)
- curl — curl (7.36.0)
- curl — curl (7.35.0)
- curl — curl (7.34.0)
- curl — curl (7.33.0)
- curl — curl (7.32.0)
- curl — curl (7.31.0)
- curl — curl (7.30.0)
- curl — curl (a1701eea289fe7ea80651f801cf992838a491dde)

## References

- [CNA](https://curl.se/docs/CVE-2026-8286.json)
- [CNA](https://curl.se/docs/CVE-2026-8286.html)
- [CNA](https://hackerone.com/reports/3718195)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._