Reference page — cumulative record through Tuesday, October 6, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-8924

CVE-2026-8924CRITICAL

curl curl — trailing dot domain super cookie

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  N    9.1   .0066   49.9     —

AFFECTED
  Product  Versions                                    Fixed
  curl     7.46.0 –                                    —
  curl     e77b5b7453c1e8ccd7ec0816890d98e2f392e465 –  —
  curl     8.20.0 –                                    —

TIMELINE
  May 19  Reserved by curl
  Jul 3   EXPLOIT PUBLISHED — CVE-2026-8924 (curl). Public exploit reference added.
  Jul 3   Published (CNA: curl)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-8924 (curl). Public exploit reference added.

CWE-201 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Modified

Description

A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check. This enables an attacker-controlled origin to inject cookies that curl subsequently scopes and transmits to unrelated third-party domains.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
May 19, 2026	Reserved	Reserved by curl
July 3, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-8924 (curl). Public exploit reference added.
July 3, 2026	Published	Published (CNA: curl)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-8924 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	7.46.0	—
curl	curl	—	e77b5b7453c1e8ccd7ec0816890d98e2f392e465	—
curl	curl	—	8.20.0	—

Weaknesses

CWE-201

References (3)

https://curl.se/docs/CVE-2026-8924.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-8924.json [Vendor Advisory]
https://hackerone.com/reports/3733905 [Exploit, Issue Tracking, Third Party Advisory]

Authoritative record: CVE-2026-8924 at cve.org

Vendors: curl

Weaknesses: CWE-201

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-8924 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 Tuesday, October 6, 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.