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CVE-2026-18924— HTTP/2 server push UAF

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 7.44.0版本至8.21.0版本存在资源管理错误漏洞，该漏洞源于libcurl处理HTTP/2 Server Push流时，当父句柄设置为与其他句柄共享连接，可能导致清理过程中释放后重用。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.90% · P58

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 103

VendorProduct Version RangeStatus
curl curl 7.44.0< 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
ea7134ac874a66107e54ff93657ac565cf2ec4aa< 90325ff0444cbdff368bda5d26d6405a0bb6ee43 affected
8.21.0 affected
8.20.0 affected
8.19.0 affected
… +95 more rows
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I. Basic Information for CVE-2026-18924

Vulnerability Information
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Vulnerability Title
HTTP/2 server push UAF
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent handle is set to share connections with other handles, can lead to use-after-free in the cleanup process.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
curl 资源管理错误漏洞
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 7.44.0版本至8.21.0版本存在资源管理错误漏洞，该漏洞源于libcurl处理HTTP/2 Server Push流时，当父句柄设置为与其他句柄共享连接，可能导致清理过程中释放后重用。
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 7.44.0 ~ 8.14.2 -
curl curl ea7134ac874a66107e54ff93657ac565cf2ec4aa ~ 90325ff0444cbdff368bda5d26d6405a0bb6ee43 -
curl curl 8.21.0 -

II. Public POCs for CVE-2026-18924

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III. Intelligence Information for CVE-2026-18924

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Vendor Advisories for CVE-2026-18924 (1)

Vendor Pages for CVE-2026-18924 (1)

Other References for CVE-2026-18924 (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-2026-19931 Negotiate ambient user conn reuse
CVE-2026-80231 native CA store conn reuse
CVE-2026-80229 OpenSSL provider use-after-free
CVE-2026-80230 OpenSSL pinning bypass
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-416

V. Comments for CVE-2026-18924

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