Use-after-free in cURL - CVE-2026-9080
Published: June 24, 2026
Vulnerability identifier: #VU135086
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-9080
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: curl.haxx.se
Affected software:
cURL
cURL
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the libcurl socket callback handling when calling curl_easy_pause() within the CURLMOPT_SOCKETFUNCTION callback. A local user can invoke the affected callback sequence to cause a denial of service.
This issue affects libcurl and does not affect the curl command line tool.
How to mitigate CVE-2026-9080
Install security update from vendor's website.