CVE-2026-80231
HIGHCVSS 7.5/10EPSS 0.94%
Last modified
CVE-2026-80231 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.. EPSS estimates a 0.94% chance of exploitation in the next 30 days.
Description
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.71.0, < 8.22.0 |
References
- https://curl.se/docs/CVE-2026-80231.htmlMitigation, Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-80231.jsonVendor Advisory
- https://hackerone.com/reports/3969368Exploit, Mitigation, Third Party Advisory
- https://hackerone.com/reports/3969368Exploit, Mitigation, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-80231?
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup
for a given hostname even when using a different Native CA Store setting
(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
How severe is CVE-2026-80231?
CVE-2026-80231 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80231?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-80231?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST