CVE-2020-8277
A public proof of concept exists; no exploitation attested.
- Published2020-11-19
- WeaknessCWE-400
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2020-11-1901:15CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-8277?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-8277?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 16.0 | = 16.0.6 | no fix published | NVD |
| 17.0 | = 17.0.4 | no fix published | NVD |
| 18.0 | = 18.0.3 | no fix published | NVD |
| 19.0 | = 19.0.2 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 15.x | ≥ 15.0.0, < 15.2.1 | 15.2.1 | NVD |
| 14.x | ≥ 14.13.0, < 14.15.1 | 14.15.1 | NVD |
| 12.x | ≥ 12.16.3, < 12.19.1 | 12.19.1 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 32.x | = 32 | no fix published | NVD |
| 33.x | = 33 | no fix published | NVD |
5 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- nodejs.orgPatch · Vendor Advisory
- www.oracle.comPatch
- www.oracle.comPatch
- www.oracle.comPatch
- www.oracle.comPatch
- www.oracle.comPatch
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 2 repositories, unverifiedmasahiro331/CVE-2020-8277AndrewIjano/CVE-2020-8277 PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- CNAweakness (CWE)CWE-400read 2026-10-23
- NVDweakness (CWE)CWE-400read 2026-10-23
- FIRST EPSSEPSS score54.2 %read 2026-10-23
- PoC-in-GitHubproof of concept2read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-11-19
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-8277?
Is CVE-2020-8277 actively exploited?
What is the CVSS score for CVE-2020-8277?
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