Vulnerability Intelligence Report
stale proxy password leak
CVE-2026-9079
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.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:1.06%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-522 ↗Insufficiently Protected Credentials
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| curl | curl | 8.8.0 < 8.14.2 (affected), 8.15.0 < 8.16.1 (affected), 8.17.0 < 8.20.1 (affected) |
| curl | curl | d5e83eb745762f48d8fafadc5df5dd3ae8d8941e < 88c7e16cceec816a2df45c899d49b1e85513f193 (affected) |
| curl | curl | 8.20.0 (affected), 8.19.0 (affected), 8.18.0 (affected), 8.17.0 (affected), 8.16.0 (affected), 8.15.0 (affected), 8.14.1 (affected), 8.14.0 (affected), 8.13.0 (affected), 8.12.1 (affected), 8.12.0 (affected), 8.11.1 (affected), 8.11.0 (affected), 8.10.1 (affected), 8.10.0 (affected), 8.9.1 (affected), 8.9.0 (affected), 8.8.0 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
1.064%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | curl · Open Source · Sweden |
| Reserved | 2026-05-20T12:59:41 |
| Published | 2026-07-03T06:16:51 |
| Last Updated | 2026-09-15T06:03:28 |
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