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-2020-8231

CVE-2020-8231HIGH

n/a https://github.com/curl/curl — Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  N  N    7.5   .0534   92.5     —

AFFECTED
  Product                       Versions                                  Fixed
  https://github.com/curl/curl  libcurl 7.29.0 to and including 7.71.1 –  —

TIMELINE
  Jan 28  Reserved by hackerone
  Dec 14  Published (CNA: hackerone)
  Oct 14  ENRICHED — CVE-2020-8231 (https://github.com/curl/curl). Received CVSS 7.5 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2020-8231 (https://github.com/curl/curl). Public exploit reference added.

CWE-416 · CNA: hackerone · CVSS v3.1 · 10 references · NVD status: Modified

Description

Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
January 28, 2020	Reserved	Reserved by hackerone
December 14, 2020	Published	Published (CNA: hackerone)
October 14, 2026	ENRICHED	ENRICHED — CVE-2020-8231 (https://github.com/curl/curl). Received CVSS 7.5 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-8231 (https://github.com/curl/curl). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	https://github.com/curl/curl	—	libcurl 7.29.0 to and including 7.71.1	—

Weaknesses

CWE-416

References (10)

https://cert-portal.siemens.com/productcert/html/ssa-389290.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf [Patch, Third Party Advisory]
https://curl.haxx.se/docs/CVE-2020-8231.html [Patch, Third Party Advisory]
https://hackerone.com/reports/948876 [Exploit, Issue Tracking, Patch, Third Party Advisory]
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E [Mailing List, Third Party Advisory]
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202012-14 [Third Party Advisory]
https://www.debian.org/security/2021/dsa-4881 [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuapr2022.html [Patch, Third Party Advisory]

Authoritative record: CVE-2020-8231 at cve.org

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-8231 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.