CVE-2026-121746

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (6th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-117176 (ENISA EUVD)Source: ENISA EUVD

5.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Harborist) states them: "Upgrade to nvm 0.41.0 or later."

Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, nvm use --save and nvm install --save (or -w) write the resolved version to $PWD/.nvmrc with tee, which follows a symbolic link. A repository that commits .nvmrc as a symlink to a path outside itself (git recreates the link on clone) therefore makes --save truncate any file the user can write, such as a shell startup file or ~/.ssh/authorized_keys, and replace its contents with the version string, or create the target of a dangling link; the link itself is left unchanged, so git status stays clean. The attacker does not control the content written, so this is data loss, not code execution. Version 0.41.0 refuses, with a warning, to write when .nvmrc in the current directory is a symlink, dangling or not, rather than writing through it or replacing it.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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
0.2%
EPSS %ILE
6th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: 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 public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 4, 2026

Last Modified

November 10, 2026

Advisory Details (2)

Auto-updated Nov 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
GitHub commit Patch Available

commit 3f8411e58d40 (nvm-sh/nvm)

Patch available: nvm-sh/nvm v0.41.0 (contains commit 3f8411e58d40)

https://github.com/nvm-sh/nvm/commit/3f8411e58d40b904e4ff6a96512391f56bd95bf7
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Arbitrary file overwrite via a symlinked .nvmrc written by --save · Advisory · nvm-sh/nvm · GitHub

Affected: v0.41.0, in

https://github.com/nvm-sh/nvm/security/advisories/GHSA-8qjx-8r8m-mpqh

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 11× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-11-10 21:50 UTCEchelonGraph re-scored
  5. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-11-09 21:42 UTCEchelonGraph re-scored
  7. 2026-11-09 20:45 UTCEchelonGraph re-scored
  8. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-11-04 23:03 UTCENISA EUVD ID recordedEUVD-2026-117176 · Source: ENISA EUVD
  14. 2026-11-04 22:30 UTCEchelonGraph re-scored
  15. 2026-11-04 21:41 UTCEchelonGraph re-scoredFirst assessed: 5.5 MEDIUM
  16. 2026-11-04 21:40 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-121746?
CVE-2026-121746 is a medium-severity vulnerability; its CVE record was published on November 4, 2026. Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, nvm use --save and nvm install --save (or -w) write the resolved version to $PWD/.nvmrc with tee, which follows a symbolic link. A repository that commits .nvmrc…
When was the CVE record for CVE-2026-121746 published?
The CVE record for CVE-2026-121746 was published on November 4, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 10, 2026; the record at its source may have been updated since.
Is CVE-2026-121746 actively exploited?
CVE-2026-121746 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-121746?
CVE-2026-121746 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-121746?
A fix for CVE-2026-121746 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Harborist) states them: "Upgrade to nvm 0.41.0 or later."

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-121746

Explore →

Is Your Infrastructure Affected by CVE-2026-121746?

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

Book a Demo →Browse All CVEs