CVE-2026-7168
Published:May 13, 2026
Updated:May 16, 2026
Successfully using libcurl to do a transfer over a specific HTTP proxy
("proxyA") with Digest authentication and then changing the proxy host to
a second one ("proxyB") for a second transfer, reusing the same handle, makes
libcurl wrongly pass on the "Proxy-Authorization:" header field meant for
"proxyA", to "proxyB".
Affected Packages
https://github.com/curl/curl.git (GITHUB):
Affected version(s) >=curl-7_12_0 <curl-8_20_0Fix Suggestion:
Update to version curl-8_20_0Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Authentication Bypass by Capture-replay
EPSS
Base Score:
0.07