Vulnerability · Published Sep 6, 2026 · Assigned by curl
CVE-2026-80231native CA store conn reuse
High 7.5
In plain English
A high-severity security flaw in curl from curl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.9%top 40.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | curl | 8.22.0-r0 | ALPINE-CVE-2026-80231 |
| Alpine:v3.24 | curl | 8.22.0-r0 | ALPINE-CVE-2026-80231 |
| Ubuntu:22.04:LTS | curl | no fix listed | UBUNTU-CVE-2026-80231 |
| Ubuntu:24.04:LTS | curl | no fix listed | UBUNTU-CVE-2026-80231 |
| Ubuntu:26.04:LTS | curl | no fix listed | UBUNTU-CVE-2026-80231 |
Affected products (as reported)
Weakness: CWE-488 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H