CVE-2026-9080

high

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.

References

References
More

https://www.securityweek.com/25-year-old-vulnerability-patched-in-curl/

https://securityaffairs.com/194220/security/curl-fixes-a-25-year-old-bug-in-its-largest-cve-release-yet.html

https://hackerone.com/reports/3749204

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-41511

https://curl.se/docs/CVE-2026-9080.json

https://curl.se/docs/CVE-2026-9080.html

Details

Source: Mitre, NVD

Published: 2026-07-03

Updated: 2026-09-15

Named Vulnerability: GHSA-hf34-v47h-w6m3

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Severity: High

EPSS

EPSS: 0.00494