CVE-2026-18924
High
High exploit probability or critical severity with a known exploit.
CVSS base
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS — probability of exploitation (30 days)
0.9%
58.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-416
Published 2026-09-06 · modified 2026-09-15
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-09-06 — Published (NVD)
- 2026-09-15 — Last modified (NVD)
Description
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.