The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.
CVE-2020-7774
“▲” beside the score: it is higher than NVD's CVSS score.
Score elevated to 8.5 because EPSS predicted 69% probability of exploitation within the next 30 days (99th percentile of EPSS-scored CVEs) when EchelonGraph scored this CVE. NVD baseline CVSS 7.3 retained for reference. Confidence: see factors.
- High exploitation likelihood — EPSS 69%
A fix is available — apply it.
- CVSS v3
- 7.3
- EG Score
- 8.5HIGHhigh confidence
- EG Risk
- 61EG Risk 61/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity73% × 45%Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation69% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 69%
- EPSS %ILE
- 99th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.5): severity, escalated by confirmed exploitation. This CVE's 8.5 is EPSS's lift toward 9.0 from its impact severity (EG Severity, CVSS 7.3 HIGH): a likelihood of exploitation, not impact.
- EG Severity
- 7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 69% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
November 17, 2020
Last Modified
November 21, 2024
References (6)
- report@snyk · CVE Programhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory
- report@snyk · CVE Programhttps://github.com/yargs/y18n/issues/96Exploit · Third Party Advisory
- report@snyk · CVE Programhttps://github.com/yargs/y18n/pull/108Patch · Third Party Advisory
- report@snyk · CVE Programhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038306Exploit · Third Party Advisory
- report@snyk · CVE Programhttps://snyk.io/vuln/SNYK-JS-Y18N-1021887Exploit · Third Party Advisory
- report@snyk · CVE Programhttps://www.oracle.com/security-alerts/cpuApr2021.htmlPatch · Third Party Advisory
Vendor Advisories for CVE-2020-7774(4)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2021:2438Red Hat Product SecurityMedium
Red Hat Security Advisory: OpenShift Container Platform 4.8.2 bug fix and security update
- RHSA-2021:2041Red Hat Product SecurityMedium
Red Hat Security Advisory: Red Hat OpenShift Container Storage 4.7.0 security, bug fix, and enhancement update
- RHSA-2021:0548Red Hat Product SecurityMedium
Red Hat Security Advisory: nodejs:10 security update
- RHSA-2021:0521Red Hat Product SecurityMedium
Red Hat Security Advisory: rh-nodejs10-nodejs security update
Patch Availability(9)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | openshift4/ose-thanos-rhel8:v4.8.0-202106291913.p0.git.c358e96.assembly.stream | 2021-07-27 | redhat |
| redhat | ocs4/mcg-core-rhel8:5.7.0-60.2c1fdb0.5.7 | 2021-05-19 | redhat |
| redhat | openshift4/ose-grafana:v4.7.0-202102130115.p0 | 2021-02-24 | redhat |
| redhat | nodejs:14-8030020210126165503.229f0a1c | 2021-02-16 | redhat |
| redhat | nodejs:10-8030020210118191659.229f0a1c | 2021-02-16 | redhat |
| redhat | rh-nodejs10-nodejs-0:10.23.1-2.el7 | 2021-02-15 | redhat |
| redhat | rh-nodejs14-nodejs-0:14.15.4-2.el7 | 2021-02-04 | redhat |
| redhat | nodejs:12-8030020201124152102.229f0a1c | 2020-12-15 | redhat |
| redhat | rh-nodejs12-nodejs-0:12.19.1-2.el7 | 2020-12-01 | 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.
Affected Packages
(20 across 20 ecosystems)
Alpine:v3.10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.15(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.16(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.17(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.18(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.19(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.20(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| nodejs | — |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-y18n | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-y18n | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-y18n | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-y18n | — |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| y18n | 4.0.0 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(5)
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.
- Red HatRHSA-2020:5305MODERATE2020-10-25
RHSA-2020:5305 — Moderate
- Red HatRHSA-2020:5499MODERATE2020-10-25
RHSA-2020:5499 — Moderate
- Red HatRHSA-2020:5633MODERATE2020-10-25
RHSA-2020:5633 — Moderate
- Red HatRHSA-2021:0421MODERATE2020-10-25
RHSA-2021:0421 — Moderate
- Red HatRHSA-2021:0551MODERATE2020-10-25
RHSA-2021:0551 — Moderate
Data Freshness Timeline
(refreshed 6× in last 7d / 23× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 83 of 123 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 17 repeat rows among the latest 100 are merged into the row they repeat. The 40 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-20 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-19 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-18 09:17 UTCEG score recompute
- 2026-10-17 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-15 16:27 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-14 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-13 16:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-12 19:31 UTCEG score recompute
- 2026-10-11 23:55 UTCEG score recompute
- 2026-10-11 13:43 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-10 19:56 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-09 20:04 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-09 14:25 UTCOSV refresh
- 2026-10-07 23:44 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-06 15:13 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-03 14:22 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-10-01 19:46 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-30 15:23 UTCEG score recompute
- 2026-09-30 14:59 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-26 15:54 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-24 14:00 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-22 14:44 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-21 20:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-19 21:51 UTCOSV refresh
- 2026-09-19 15:37 UTCEPSS rescoreEPSS 69% · 99th percentile
Show 58 moreShow fewer
- 2026-09-18 19:23 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-16 14:04 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-15 03:06 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-13 16:43 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-12 14:57 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-06 13:44 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-05 15:25 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-04 05:03 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-02 14:08 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-09-01 01:34 UTCOSV refresh
- 2026-08-30 19:14 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-28 21:37 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-27 14:21 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-21 23:45 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-19 17:00 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-17 13:43 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-16 02:11 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-15 01:22 UTCOSV refresh
- 2026-08-13 21:57 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-12 13:47 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-06 13:43 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-05 19:14 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-08-02 02:24 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-30 16:25 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-30 13:44 UTCOSV refresh
- 2026-07-30 01:27 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-28 15:33 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-26 14:52 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-25 14:15 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-24 14:15 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-23 01:55 UTCEG score recompute▲ 1.20
- 2026-07-22 22:41 UTCEG score recompute
- 2026-07-22 14:05 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-19 14:28 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-18 10:02 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-15 16:55 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-13 22:27 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-13 06:10 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-12 23:07 UTCOSV refresh
- 2026-07-12 05:44 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-09 19:07 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-04 06:29 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-02 16:57 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-07-01 15:03 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-29 14:04 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-28 14:05 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-28 04:54 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-27 03:06 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-25 13:48 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-24 14:03 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-24 08:50 UTCOSV refresh
- 2026-06-23 21:31 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-21 01:57 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-19 19:24 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-17 17:50 UTCEPSS rescoreEPSS 69% · 99th percentile
- 2026-06-16 17:50 UTCEPSS rescoreEPSS 69% · 99th percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.10:nodejs
- CVE-2019-15606EG 9.8EPSS p97CRITICAL
- CVE-2019-15605EG 9.8EPSS p99CRITICAL
- CVE-2017-15896EG 9.1CRITICAL
- CVE-2019-9515NVD 7.5EG 9.0EPSS p100CRITICAL
- CVE-2019-9512NVD 7.5EG 9.0EPSS p100CRITICAL
- CVE-2019-9514NVD 7.5EG 8.9EPSS p100HIGH
- CVE-2019-9513NVD 7.5EG 8.9EPSS p100HIGH
- CVE-2018-7160EG 8.8EPSS p96HIGH
- CVE-2019-9511NVD 7.5EG 8.3EPSS p99HIGH
- CVE-2018-12122NVD 7.5EG 7.8EPSS p99HIGH
Same vendor
10 shownredhat:RHSA-2020:5305 · redhat:RHSA-2021:0421 · redhat:RHSA-2020:5633
Same CWE
10 shownCWE-1321
Frequently asked(5)
What is CVE-2020-7774?
When was CVE-2020-7774 made public?
Is CVE-2020-7774 actively exploited?
What is the CVSS score of CVE-2020-7774?
How do I remediate CVE-2020-7774?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-7774
Is Your Infrastructure Affected by CVE-2020-7774?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.