CVE-2026-18924

9.1 criticalEPSS 0.6%

Critical (9.1) in haxx curl. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.1 critical

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-416
Published: 2026-09-06
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

Affected

haxx:curl

References

https://curl.se/docs/CVE-2026-18924.html
https://curl.se/docs/CVE-2026-18924.json
https://hackerone.com/reports/3916059
https://hackerone.com/reports/3916059

Check your stack JSON