Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-10536— HTTP/2 stream-dependency tree 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存在资源管理错误漏洞，该漏洞源于释放后重用，当应用程序通过CURLOPT_STREAM_DEPENDS或CURLOPT_STREAM_DEPENDS_E配置HTTP/2流依赖树，随后调用curl_easy_reset()，并最终使用curl_easy_cleanup()终止句柄时，在最终清理阶段libcurl尝试访问和修改在重置操作期间已释放的内部结构。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.60% · P47

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 37

VendorProduct Version RangeStatus
curl curl 7.88.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
71b7e0161032927cdfb4e75ea40f65b8898b3956< bfbff7852f050232edd3e5ca5c6bf2021c340f5a affected
8.20.0 affected
8.19.0 affected
8.18.0 affected
8.17.0 affected
… +29 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-10536

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
HTTP/2 stream-dependency tree UAF
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or `CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and finally terminates the handle with `curl_easy_cleanup()`. During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.
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存在资源管理错误漏洞，该漏洞源于释放后重用，当应用程序通过CURLOPT_STREAM_DEPENDS或CURLOPT_STREAM_DEPENDS_E配置HTTP/2流依赖树，随后调用curl_easy_reset()，并最终使用curl_easy_cleanup()终止句柄时，在最终清理阶段libcurl尝试访问和修改在重置操作期间已释放的内部结构。
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 7.88.0 ~ 8.14.2 -
curl curl 71b7e0161032927cdfb4e75ea40f65b8898b3956 ~ bfbff7852f050232edd3e5ca5c6bf2021c340f5a -
curl curl 8.20.0 -

II. Public POCs for CVE-2026-10536

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-10536

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-10536 (3)

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-2026-8924 trailing dot domain super cookie
CVE-2026-12064 proto-default skips SSH verification
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-416

V. Comments for CVE-2026-10536

No comments yet

Leave a comment