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-2026-10536

CVE-2026-10536CRITICAL

curl curl — HTTP/2 stream-dependency tree UAF

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0060   46.8     —

AFFECTED
  Product  Versions                                    Fixed
  curl     7.88.0 –                                    —
  curl     71b7e0161032927cdfb4e75ea40f65b8898b3956 –  —
  curl     8.20.0 –                                    —

TIMELINE
  Jun 1   Reserved by curl
  Jul 3   EXPLOIT PUBLISHED — CVE-2026-10536 (curl). Public exploit reference added.
  Jul 3   Published (CNA: curl)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-10536 (curl). Public exploit reference added.

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

Description

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or `CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and finally terminates the handle with `curl_easy_cleanup()`. During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
June 1, 2026	Reserved	Reserved by curl
July 3, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-10536 (curl). Public exploit reference added.
July 3, 2026	Published	Published (CNA: curl)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-10536 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	7.88.0	—
curl	curl	—	71b7e0161032927cdfb4e75ea40f65b8898b3956	—
curl	curl	—	8.20.0	—

Weaknesses

CWE-416

References (3)

https://curl.se/docs/CVE-2026-10536.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-10536.json [Vendor Advisory]
https://hackerone.com/reports/3751697 [Exploit, Issue Tracking, Third Party Advisory]

Authoritative record: CVE-2026-10536 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-2026-10536 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.