CVE-2026-80231CWE-488

CVE-2026-80231

High · published September 6, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
59.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00898 · 59.2th percentile
Weakness
CWE-488 · Exposure of Data Element to Wrong Session
Published
2026-09-06T22:17Z
Affected products (1)
ProductVersionsFixed in
haxx/curl≥ 7.71.0, < 8.22.08.22.0
References (4)
https://curl.se/docs/CVE-2026-80231.html · 2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2026-80231.json · 2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/3969368 · 2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/3969368 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 08 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 06 SEP 17:48Z
    native CA store conn reuse
    cvelistv5