What’s Vulnerable › Vulnerabilities

CVE-2026-7009: OCSP stapling bypass with Apple SecTrust

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-13 · updated 2026-06-17
• Weakness: CWE-295

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.

Affected products

• curl: from 8.17.0 before 8.20.0 — fixed in 8.20.0

How to fix

Upgrade to a fixed version: curl 8.20.0. Check the vendor advisory for mitigations.

References

• https://curl.se/docs/CVE-2026-7009.html
• https://curl.se/docs/CVE-2026-7009.json
• https://hackerone.com/reports/3694390
• http://www.openwall.com/lists/oss-security/2026/04/29/12
• https://hackerone.com/reports/3694390

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