CVE-2026-80231

highpriority · track · 0EPSS 0.009 · 59 %ileDEFRUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.90% (59th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cert_bund · nvd · certfr · osv

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-488US

affected products (9)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
IBM AIX 7.3all versionscert_bundDEcpe:/o:ibm:aix:7.3
Microsoft Azure Linux azl3all versionscert_bundDEcpe:/o:microsoft:azure_linux:azl3
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source Open Source cURL <8.22.0< 8.22.0cert_bundDE
Open Source cURL< 8.22.0cert_bundDE
haxx curl7.71.0 → 8.22.0nvdUScpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

advisories (5)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3149cURL: Mehrere SchwachstellenDeutsch2026-09-01csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um Sicherheitsmechanismen zu umgehen, Informationen offenzulegen und einen Denial-of-Service-Zustand herbeizuführen.
WID-SEC-W-2026-3642Meinberg LANTIME: Mehrere SchwachstellenDeutsch2026-09-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Meinberg LANTIME ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren, Denial-of-Service-Zustände herbeizuführen, sowie weitere, nicht näher spezifizierte Angriffe zu starten.
CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
CURL-CVE-2026-80231native CA store conn reuse2026-09-02vendor · osvUS
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.

sources

Which sources assert this record, and when.

cert_bund nvd certfr osv NVD CVE.org MITRE

published 2026-09-06modified 2026-09-15

references (3) nvd

External citations — patches, advisories, analysis.

https://curl.se/docs/CVE-2026-80231.htmlMitigationPatchVendor Advisory
https://curl.se/docs/CVE-2026-80231.jsonVendor Advisory
https://hackerone.com/reports/3969368ExploitMitigationThird Party Advisory

scry

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