CVE-2026-80231
highA 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 (`CURLSSLO…
Vendor / product: Haxx — curl
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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-09-06 18:17
Modified: 2026-09-15 07:16
NVD status: Modified
Last synced 2 days ago
Verified against the source API 2026-10-27 06:50 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
haxx / curl ≥7.71.0 <8.22.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://curl.se/docs/CVE-2026-80231.html
Vendor advisory: https://curl.se/docs/CVE-2026-80231.json
Patch / mitigation: https://curl.se/docs/CVE-2026-80231.html
Patch / mitigation: https://hackerone.com/reports/3969368
Patch / mitigation: https://hackerone.com/reports/3969368
References
- https://curl.se/docs/CVE-2026-80231.html 2499f714-1537-4658-8207-48ae4bb9eae9
- https://curl.se/docs/CVE-2026-80231.json 2499f714-1537-4658-8207-48ae4bb9eae9
- https://hackerone.com/reports/3969368 2499f714-1537-4658-8207-48ae4bb9eae9
- https://hackerone.com/reports/3969368 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:50 UTC · record ↗