CVE-2020-8231

HIGHNVD 7.57.5—

7.5

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

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 36.6%
KEV: Not listed

Published

December 14, 2020

Last Modified

November 21, 2024

References (16)

support@hackeronehttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
support@hackeronehttps://curl.haxx.se/docs/CVE-2020-8231.html
support@hackeronehttps://hackerone.com/reports/948876
support@hackeronehttps://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
support@hackeronehttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
support@hackeronehttps://security.gentoo.org/glsa/202012-14
support@hackeronehttps://www.debian.org/security/2021/dsa-4881
support@hackeronehttps://www.oracle.com/security-alerts/cpuapr2022.html
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
af854a3a-2127-422b-91ae-364da2661108https://curl.haxx.se/docs/CVE-2020-8231.html
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/948876
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202012-14
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4881

Patch Availability(4)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libcurl4-openssl-dev (7.47.0-1ubuntu2.16) @ xenial	2026-05-23	ubuntu
ubuntu	curl (7.35.0-1ubuntu2.20+esm5) @ trusty	2026-05-23	ubuntu
ubuntu	libcurl4-openssl-dev (7.68.0-1ubuntu2.4) @ focal	2026-05-23	ubuntu
redhat	curl-0:7.61.1-18.el8	2021-05-18	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-416Use After Free

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 11:29 UTCOSV refresh
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-8231?

CVE-2020-8231 is a high vulnerability published on December 14, 2020. Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.

When was CVE-2020-8231 disclosed?

CVE-2020-8231 was first published in the National Vulnerability Database on December 14, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-8231 actively exploited?

CVE-2020-8231 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-8231?

CVE-2020-8231 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2020-8231?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-8231, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-8231

Explore →

Is Your Infrastructure Affected by CVE-2020-8231?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs