CVE-2026-6429

MEDIUMNVD 5.35.3—

5.3

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.

CVSS v3: 5.3
EG Score: 5.3(high)
EPSS: 6.1%
KEV: Not listed

Published

May 13, 2026

Last Modified

May 14, 2026

References (3)

2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-6429.html
2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-6429.json
2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/3677759

Vendor Advisories for CVE-2026-6429(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-6429
Microsoft Security Response Center (MSRC)
netrc credential leak with reused proxy connection

Frequently asked(5)

What is CVE-2026-6429?

CVE-2026-6429 is a medium vulnerability published on May 13, 2026. 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.

When was CVE-2026-6429 disclosed?

CVE-2026-6429 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-6429 actively exploited?

CVE-2026-6429 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-6429?

CVE-2026-6429 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2026-6429?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6429, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-6429

📅 Published

🔄 Last Modified

🔗 References (3)

📣 Vendor Advisories for CVE-2026-6429(1)

❓ Frequently asked(5)