Vulnerability 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.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 8.8.0, < 8.21.0 |
Related Weaknesses (CWE)
References
- https://curl.se/docs/CVE-2026-9079.htmlPatchVendor Advisory
- https://curl.se/docs/CVE-2026-9079.jsonVendor Advisory
- https://hackerone.com/reports/3750295ExploitIssue TrackingThird Party Advisory
- https://hackerone.com/reports/3750295ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2026-9079?
CVE-2026-9079 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2026-9079?
CVE-2026-9079 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-9079?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Curl.