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CVE-2026-8924— trailing dot domain super cookie

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存在信息泄露漏洞，该漏洞源于Cookie解析逻辑缺陷，允许恶意HTTP服务器设置绕过公共后缀列表检查的“超级cookie”，从而使攻击者控制的源注入curl随后作用域并传输到无关第三方域的Cookie。

AI Predicted 8.1 Difficulty: Easy EPSS 0.66% · P50

Affected Version Matrix 99

VendorProduct Version RangeStatus
curl curl 7.46.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
e77b5b7453c1e8ccd7ec0816890d98e2f392e465< 51beed175dbfc37da3113f6acce60c630c070ce8 affected
8.20.0 affected
8.19.0 affected
8.18.0 affected
8.17.0 affected
… +91 more rows
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I. Basic Information for CVE-2026-8924

Vulnerability Information
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Vulnerability Title
trailing dot domain super cookie
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
curl 信息泄露漏洞
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存在信息泄露漏洞，该漏洞源于Cookie解析逻辑缺陷，允许恶意HTTP服务器设置绕过公共后缀列表检查的“超级cookie”，从而使攻击者控制的源注入curl随后作用域并传输到无关第三方域的Cookie。
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 7.46.0 ~ 8.14.2 -
curl curl e77b5b7453c1e8ccd7ec0816890d98e2f392e465 ~ 51beed175dbfc37da3113f6acce60c630c070ce8 -
curl curl 8.20.0 -

II. Public POCs for CVE-2026-8924

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III. Intelligence Information for CVE-2026-8924

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Vendor Advisories for CVE-2026-8924 (2)

Other References for CVE-2026-8924 (1)

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

CVE-2026-9546 sending old referer
CVE-2026-8932 incomplete mTLS config matching in conn reuse
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-2026-12064 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-201

V. Comments for CVE-2026-8924

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