CVE-2026-7009 Details
Description
When curl is told to use the Certificate Status Request TLS extension, often referred to as *OCSP stapling*, to verify that the server certificate is valid, it fails to detect OCSP problems and instead wrongly consider the response as fine.
A vulnerability exists in curl and libcurl when built with an OpenSSL-based backend and used with Apple SecTrust, which accesses the native CA certificate store on Apple operating systems. This vulnerability allows curl to bypass proper verification of OCSP stapling, a feature that ensures server certificates are valid. As a result, connections can be established even when the server fails to provide a necessary OCSP response, contrary to the expected behavior that would abort the connection in such cases.
Users can upgrade curl and libcurl to version 8.20.0, apply the patch available in the curl GitHub repository, or avoid using OCSP stapling with Apple SecTrust.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://hackerone.com/reports/3694390 | CISA-ADP | ExploitIssue TrackingPatch |
| https://curl.se/docs/CVE-2026-7009.html | curl | PatchVendor Advisory |
| https://curl.se/docs/CVE-2026-7009.json | curl | Product |
| https://hackerone.com/reports/3694390 | curl | ExploitIssue TrackingPatch |
| http://www.openwall.com/lists/oss-security/2026/04/29/12 | CVE | Mailing ListPatchThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-295 | Improper Certificate Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| haxx curl | >= 8.17.0, < 8.20.0 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | curl |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | CVE Modified | CISA-ADP |
| May 13, 2026 | New CVE Received | curl |
| May 13, 2026 | CVE Modified | CVE |