CVE-2026-18924

critical · 9.1

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.

9.1

CVSS

0.6%

EPSS (exploit prob.)

48th

EPSS percentile

2026-09-06

Published

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

Weaknesses

CWE-416

Affected products

Vendor	Product	Affected versions
haxx	curl	>= 7.44.0, < 8.22.0

Check a specific version with /api/v1/cve/match.

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-18924