High severity · published Jul 3, 2026
CVE-2026-9080
UAF after pause in socket callback
7.3
CVSS
0.5%
EPSS
No
On KEV
Description
Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION`
callback triggers a use-after-free vulnerability, where libcurl attempts to
store a flag using a dangling struct pointer immediately after that pointer's
memory has been freed.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
curl · curl
8.13.0 before 8.14.2; 8.15.0 before 8.16.1; 8.17.0 before 8.20.1; cfc657a48dbafb4194676d4c9d841388b3a22210 before 5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd; 8.20.0; 8.19.0; +7 more · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9080
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9080
Patch
https://curl.se/docs/CVE-2026-9080.html
Vendor Advisory
https://curl.se/docs/CVE-2026-9080.json
Exploit
https://hackerone.com/reports/3749204
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