CVE-2026-6429

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 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://curl.se/docs/CVE-2026-6429.html	Patch Vendor Advisory
https://curl.se/docs/CVE-2026-6429.json	Product
https://hackerone.com/reports/3677759	Exploit Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

History

14 May 2026, 14:18

Type	Values Removed	Values Added
First Time		Haxx Haxx curl
CPE		cpe:2.3:a:haxx:curl::::::::
CWE		NVD-CWE-noinfo
References	~~() https://curl.se/docs/CVE-2026-6429.html -~~	() https://curl.se/docs/CVE-2026-6429.html - Patch, Vendor Advisory
References	~~() https://curl.se/docs/CVE-2026-6429.json -~~	() https://curl.se/docs/CVE-2026-6429.json - Product
References	~~() https://hackerone.com/reports/3677759 -~~	() https://hackerone.com/reports/3677759 - Exploit, Issue Tracking, Third Party Advisory

13 May 2026, 14:50

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-13 13:01

Updated : 2026-06-17 11:00

NVD link : CVE-2026-6429

Mitre link : CVE-2026-6429

CVE.ORG link : CVE-2026-6429

JSON object : View

Products Affected

haxx

curl

CWE

NVD-CWE-noinfo

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"https://curl.se/docs/CVE-2026-6429.json", "tags": ["Product"], "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}, {"url": "https://hackerone.com/reports/3677759", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "source": "2499f714-1537-4658-8207-48ae4bb9eae9"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "When asked to both use a `.netrc` file for credentials and to follow HTTP\nredirects, libcurl could leak the password used for the first host to the\nfollowed-to host under certain circumstances."}], "lastModified": "2026-06-17T11:00:49.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "92C0C270-A4E4-4DF0-96F1-833497B9CBDF", "versionEndExcluding": "8.20.0", "versionStartIncluding": "7.14.0"}], "operator": "OR"}]}], "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"}