How severe is CVE-2020-8277?

CVE-2020-8277 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-8277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8277?

CVE-2020-8277 primarily affects Nodejs Node.js. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-8277 published?

CVE-2020-8277 was published on 2020-11-19 and last updated on 2026-06-17.

CVE-2020-8277

CVE-2020-8277 is a high-severity vulnerability in Nodejs Node.js with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 54% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 54% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Nodejs Node.js
Published: 2020-11-19
Last modified: 2026-06-17

Description

A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.

Frequently asked questions

What is CVE-2020-8277?: A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.
How severe is CVE-2020-8277?: CVE-2020-8277 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-8277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8277?: CVE-2020-8277 primarily affects Nodejs Node.js. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-8277 published?: CVE-2020-8277 was published on 2020-11-19 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm:19.3.4:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:20.3.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:jd_edwards_enterpriseone_tools:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_cluster:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:16.0.6:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:17.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:18.0.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_xstore_point_of_service:19.0.2:*:*:*:*:*:*:*
cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:*

More vulnerabilities in Nodejs Node.js

CVE-2026-21636 — Critical (CVSS 10.0): A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when…
CVE-2015-0278 — Critical (CVSS 10.0): libuv before 0.10.34 does not properly drop group privileges, which allows context-dependent attackers to gain…
CVE-2026-48930 — Critical (CVSS 9.8): A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to…
CVE-2024-3566 — Critical (CVSS 9.8): A command inject vulnerability allows an attacker to perform command injection on Windows applications that indirectly…
CVE-2024-21896 — Critical (CVSS 9.8): The permission model protects itself against path traversal attacks by calling path.resolve() on any paths given by the…
CVE-2023-39332 — Critical (CVSS 9.8): Various `node:fs` functions allow specifying paths as either strings or `Uint8Array` objects. In Node.js environments,…

All CVEs affecting Nodejs Node.js →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →