Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-18924

CVE-2026-18924CRITICAL

curl curl — HTTP/2 server push UAF

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  H  H    9.1   .0058   46.0     —

AFFECTED
  Product  Versions                                    Fixed
  curl     7.44.0 –                                    —
  curl     ea7134ac874a66107e54ff93657ac565cf2ec4aa –  —
  curl     8.21.0 –                                    —

TIMELINE
  Aug 5   Reserved by curl
  Sep 6   Published (CNA: curl)
  Sep 11  EXPLOIT PUBLISHED — CVE-2026-18924 (curl). Public exploit reference added.
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-18924 (curl). Public exploit reference added.

CWE-416 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Modified

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 5, 2026	Reserved	Reserved by curl
September 6, 2026	Published	Published (CNA: curl)
September 11, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-18924 (curl). Public exploit reference added.
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-18924 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	7.44.0	—
curl	curl	—	ea7134ac874a66107e54ff93657ac565cf2ec4aa	—
curl	curl	—	8.21.0	—

Weaknesses

CWE-416

References (3)

https://curl.se/docs/CVE-2026-18924.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-18924.json [Vendor Advisory]
https://hackerone.com/reports/3916059 [Exploit, Mitigation, Third Party Advisory]

Authoritative record: CVE-2026-18924 at cve.org

Vendors: curl

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-18924 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 Sunday, October 4, 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.