CVE-2026-80231

native CA store conn reuse

Published: Sep 6, 2026Updated: Sep 15, 2026 Sources: CVE List NVDCWE-488

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-488

Affected Products

curl

oss-project·USaka wcurl, libcurl

curlLibraryLibrary

OSS Libraries / generic-library

haxx

oss-project·SEaka haxx.se

curl

OSS Libraries

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2026-80231?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://curl.se/docs/CVE-2026-80231.json

curl.se

https://curl.se/docs/CVE-2026-80231.html

curl.se

https://hackerone.com/reports/3969368

hackerone.com

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