CVE-2026-11586 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-11586HIGH

curl curl — WS Auto-PONG memory exhaustion

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0049   40.3     —

AFFECTED
  Product  Versions  Fixed
  curl     8.20.0 –  —

TIMELINE
  Jun 8   Reserved by curl
  Jul 3   EXPLOIT PUBLISHED — CVE-2026-11586 (curl). Public exploit reference added.
  Jul 3   Published (CNA: curl)

CWE-770 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 8, 2026	Reserved	Reserved by curl
July 3, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-11586 (curl). Public exploit reference added.
July 3, 2026	Published	Published (CNA: curl)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	8.20.0	—

Weaknesses

CWE-770

References (3)

https://curl.se/docs/CVE-2026-11586.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-11586.json [Vendor Advisory]
https://hackerone.com/reports/3788931 [Exploit, Issue Tracking, Third Party Advisory]

Authoritative record: CVE-2026-11586 at cve.org

Vendors: curl

Weaknesses: CWE-770

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-11586 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.