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CVE-2026-80230— OpenSSL pinning bypass

Quick assessment

Affected
curl curl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 7.45.0版本至8.21.0版本存在加密问题漏洞，该漏洞源于配置CURLOPT_PINNEDPUBLICKEY时同时设置CURLOPT_SSL_VERIFYPEER=0和CURLOPT_SSL_VERIFYHOST=0禁用标准对端验证，未能在没有提供服务器证书的连接上强制执行公钥固定，可能导致未认证连接绕过固定检查成功建立。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 102

VendorProduct Version RangeStatus
curl curl 7.45.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
8.21.0< 8.22.0 affected
8363656cb4e0c60a11d8531ead0ec43120b50591< 5267ed859d545534d0c21675a2b70af5a3b6e3ef affected
8.21.0 affected
8.20.0 affected
8.19.0 affected
… +94 more rows
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I. Basic Information for CVE-2026-80230

Vulnerability Information
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Vulnerability Title
OpenSSL pinning bypass
Source: CVE Program / CVE List V5
Vulnerability Description
When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
curl 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 7.45.0版本至8.21.0版本存在加密问题漏洞，该漏洞源于配置CURLOPT_PINNEDPUBLICKEY时同时设置CURLOPT_SSL_VERIFYPEER=0和CURLOPT_SSL_VERIFYHOST=0禁用标准对端验证，未能在没有提供服务器证书的连接上强制执行公钥固定，可能导致未认证连接绕过固定检查成功建立。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
curl curl 7.45.0 ~ 8.14.2 -
curl curl 8363656cb4e0c60a11d8531ead0ec43120b50591 ~ 5267ed859d545534d0c21675a2b70af5a3b6e3ef -
curl curl 8.21.0 -

II. Public POCs for CVE-2026-80230

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III. Intelligence Information for CVE-2026-80230

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Vendor Advisories for CVE-2026-80230 (1)

Proof of Concept for CVE-2026-80230 (1)

Vendor Pages for CVE-2026-80230 (1)

Same Patch Batch · curl · 2026-09-06 · 9 CVEs total

CVE-2026-82208 wolfSSL CA-cache hit overrides callback
CVE-2026-82209 domain-scoped PSL domain cookie
CVE-2026-18924 HTTP/2 server push UAF
CVE-2026-19931 Negotiate ambient user conn reuse
CVE-2026-80231 native CA store conn reuse
CVE-2026-80229 OpenSSL provider use-after-free
CVE-2026-80255 secure cookie attribute bypass with tab
CVE-2026-13608 OpenLDAP SASL authentication bypass

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-295

V. Comments for CVE-2026-80230

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