CVE-2020-8252

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
—
EPSS
49.8%
KEV
Not listed

Published

September 18, 2020

Last Modified

November 21, 2024

References (16)

Vendor Advisories for CVE-2020-8252(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibuv1-dev (1.34.2-1ubuntu1.1) @ focal2026-05-23ubuntu
redhatnodejs:10-8030020210118191659.229f0a1c2021-02-16redhat
redhatrh-nodejs10-nodejs-0:10.23.1-2.el72021-02-15redhat
redhatrh-nodejs12-nodejs-0:12.18.4-3.el72020-11-12redhat
redhatnodejs:12-8010020201006223055.c27ad7f82020-11-04redhat
redhatnodejs:12-8020020201007080935.4cda2c842020-10-19redhat

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.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 51× 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.

Showing the most recent 100 of 102 total refreshes for this CVE.

  1. 2026-07-22 22:41 UTCEG score recompute
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  75. 2026-05-23 07:32 UTCEG score recompute

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Frequently asked(5)

What is CVE-2020-8252?
CVE-2020-8252 is a high vulnerability published on September 18, 2020. The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.
When was CVE-2020-8252 disclosed?
CVE-2020-8252 was first published in the National Vulnerability Database on September 18, 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-2020-8252 actively exploited?
CVE-2020-8252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-8252?
CVE-2020-8252 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2020-8252?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-8252, 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.

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