PT-2026-35896 · Curl+2 · Libcurl+2

Daniel Stenberg · Published 2026-04-29 · Updated 2026-06-05 · CVE-2026-6429

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions libcurl (affected versions not specified)

Description When configured to use a .netrc file for credentials and to follow HTTP redirects, libcurl may leak the password used for the initial host to the subsequent host during the redirect process under certain circumstances.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-6429

ECHO-2EC8-1A62-F90D

OESA-2026-2477

OPENSUSE-SU-2026:10674-1

RHSA-2026:12916

USN-8227-1

Affected Products

Linuxmint

Ubuntu

Libcurl

References · 43

• 🔥 https://hackerone.com/reports/3677759 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-6253 · Security Note
• https://osv.dev/vulnerability/CURL-CVE-2026-6429 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-7168 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8227-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-4873 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-6429 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-6429 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5545 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7168 · Security Note
• https://curl.se/docs/CVE-2026-6429.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6276 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6429 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5773 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4873 · Security Note