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

CVE-2019-5436

CVE-2019-5436HIGH

curl curl — A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .4974   98.9     —

AFFECTED
  Product  Versions           Fixed
  curl     Fixed in 7.65.0 –  —

TIMELINE
  Jan 4   Reserved by hackerone
  May 28  Published (CNA: hackerone)
  Oct 14  EXPLOIT PUBLISHED — CVE-2019-5436 (curl). Public exploit reference added.

CWE-787, CWE-122 · CNA: hackerone · CVSS v3.1 · 15 references · NVD status: Modified

Description

A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 4, 2019	Reserved	Reserved by hackerone
May 28, 2019	Published	Published (CNA: hackerone)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2019-5436 (curl). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	Fixed in 7.65.0	—

Weaknesses

CWE-787 · CWE-122

References (15)

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00008.html [Mailing List, Third Party Advisory]
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00017.html [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2019/09/11/6 [Mailing List, Patch, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://curl.haxx.se/docs/CVE-2019-5436.html [Exploit, Patch, Vendor Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2/
https://seclists.org/bugtraq/2020/Feb/36 [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202003-29 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20190606-0004/ [Third Party Advisory]
https://support.f5.com/csp/article/K55133295 [Third Party Advisory]
https://support.f5.com/csp/article/K55133295?utm_source=f5support&amp%3Butm_medium=RSS
https://www.debian.org/security/2020/dsa-4633 [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuapr2020.html [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuoct2020.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html [Patch, Third Party Advisory]

Authoritative record: CVE-2019-5436 at cve.org

Vendors: curl

Weaknesses: CWE-787 · CWE-122

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-5436 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 Monday, October 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.