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CVE-2026-8932— incomplete mTLS config matching in conn reuse

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存在授权问题漏洞，该漏洞源于TLS客户端证书配置相关选项未纳入连接池配置匹配检查，可能导致连接被错误重用。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 197

VendorProduct Version RangeStatus
curl curl 7.7.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4< 7541ae569d82fb308a5e2d94916027da4fa3ba3e affected
8.20.0 affected
8.19.0 affected
8.18.0 affected
8.17.0 affected
… +189 more rows
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I. Basic Information for CVE-2026-8932

Vulnerability Information
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Vulnerability Title
incomplete mTLS config matching in conn reuse
Source: CVE Program / CVE List V5
Vulnerability Description
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用基本弱点进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
curl 授权问题漏洞
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存在授权问题漏洞，该漏洞源于TLS客户端证书配置相关选项未纳入连接池配置匹配检查，可能导致连接被错误重用。
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 7.7.0 ~ 8.14.2 -
curl curl a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 ~ 7541ae569d82fb308a5e2d94916027da4fa3ba3e -
curl curl 8.20.0 -

II. Public POCs for CVE-2026-8932

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-8932

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Vendor Advisories for CVE-2026-8932 (2)

Other References for CVE-2026-8932 (1)

Same Patch Batch · curl · 2026-07-03 · 18 CVEs total

CVE-2026-9546 sending old referer
CVE-2026-8458 wrong reuse for different services
CVE-2026-8925 SASL double-free
CVE-2026-8286 wrong STARTTLS connection reuse
CVE-2026-8927 env-set cross-proxy Digest auth state leak
CVE-2026-8926 password leak with netrc and user in URL
CVE-2026-8924 trailing dot domain super cookie
CVE-2026-12064 proto-default skips SSH verification
CVE-2026-10536 HTTP/2 stream-dependency tree UAF
CVE-2026-11352 QUIC zero-length UDP datagrams busy-loop
CVE-2026-9545 exposing HTTP/3 early data
CVE-2026-9080 UAF after pause in socket callback
CVE-2026-9547 SSH improper host validation
CVE-2026-9079 stale proxy password leak
CVE-2026-11564 Native CA trust persist
CVE-2026-11856 cross-origin Digest auth state leak
CVE-2026-11586 WS Auto-PONG memory exhaustion

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-305

V. Comments for CVE-2026-8932

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