Vulnerability · Published Jul 3, 2026 · Assigned by curl
CVE-2026-11586WS Auto-PONG memory exhaustion
High 7.5
In plain English
A high-severity resource allocation without limits in curl from curl. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.9%top 41.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
By default, curl automatically responds to WebSocket PING frames. Because curl lacks an upper bound on memory allocation for unacknowledged frames, a malicious server can exhaust all available memory by flooding curl with rapid, sequential PING messages.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | curl | 8.22.0-r0 | ALPINE-CVE-2026-11586 |
| Alpine:v3.24 | curl | 8.21.0-r0 | ALPINE-CVE-2026-11586 |
| Debian:14 | curl | 8.21.0~rc3-1 | DEBIAN-CVE-2026-11586 |
| Ubuntu:26.04:LTS | curl | 8.18.0-1ubuntu2.3 | UBUNTU-CVE-2026-11586 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H