Description
libcurl had a flaw that when instructed to clear proxy authentication
credentials which made it not do so, leaving the old credentials around to get
used for subsequent transfers that should not know nor use them.
Published: 2026-07-03
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8487-1 curl vulnerabilities
History

Tue, 07 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-212
References
Metrics threat_severity

None

threat_severity

Important


Mon, 06 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 06 Jul 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-255

Sun, 05 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-255

Sun, 05 Jul 2026 05:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-256
CWE-322

Sat, 04 Jul 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-256
CWE-322

Sat, 04 Jul 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-269

Sat, 04 Jul 2026 05:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-269

Fri, 03 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285
CWE-287

Fri, 03 Jul 2026 10:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285
CWE-287

Fri, 03 Jul 2026 08:00:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Fri, 03 Jul 2026 06:45:00 +0000

Type Values Removed Values Added
Description libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the old credentials around to get used for subsequent transfers that should not know nor use them.
Title stale proxy password leak
References

cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-07-06T16:49:56.248Z

Reserved: 2026-05-20T12:59:41.444Z

Link: CVE-2026-9079

cve-icon Vulnrichment

Updated: 2026-07-06T16:49:51.324Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-03T06:16:51Z

Links: CVE-2026-9079 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-08T06:45:16Z

Weaknesses