Vulnerability DatabaseCVE-2026-8286
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-8286
Published:July 03, 2026
Updated:July 21, 2026
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 Packages
https://github.com/curl/curl.git (GITHUB):
Affected version(s) >=curl-7_30_0 <curl-8_21_0
Fix Suggestion:
Update to version curl-8_21_0
Related Resources (3)
https://hackerone.com/reports/3718195
https://curl.se/docs/CVE-2026-8286.json
https://curl.se/docs/CVE-2026-8286.html
Do you need more information?
Contact Us
CVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation
CWE-295
EPSS
Base Score:
0.52