CURL libcurl HTTP Redirect Password Leak via .netrc
CVE-2026-6429 Published on May 13, 2026

netrc credential leak with reused proxy connection
When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances.

NVD

Vulnerability Analysis

CVE-2026-6429 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

What is an Information Disclosure Vulnerability?

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

CVE-2026-6429 has been classified to as an Information Disclosure vulnerability or weakness.


Products Associated with CVE-2026-6429

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Canonical Ubuntu Linux
 
Haxx Curl
 

Affected Versions

curl: curl: curl:

Exploit Probability

EPSS
0.37%
Percentile
28.84%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.