CVE-2016-3956

The CLI in npm before 2.15.1 and 3.x before 3.8.3, as used in Node.js 0.10 before 0.10.44, 0.12 before 0.12.13, 4 before 4.4.2, and 5 before 5.10.0, includes bearer tokens with arbitrary requests, which allows remote HTTP servers to obtain sensitive information by reading Authorization headers.

Published: 2016-07-02 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-3956 is rated High Risk (66.1/100): CVSS High severity, with high exploitation likelihood (EPSS 6.75%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.54% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-3956

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.21% 6.75% +3.54%
2 2026-03-08 2.62% 3.21% +0.59%
3 2026-03-04 — 2.62% —

Full EPSS history (39 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3956

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-3956

GitHub Security Advisory for CVE-2016-3956

OS Trackers for CVE-2016-3956

vendor priority summary link
debian not yet assigned CVE-2016-3956 not yet assigned priority: Debian including 1 source packages (npm), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-3956
redhat medium — https://access.redhat.com/security/cve/CVE-2016-3956
suse medium CVE-2016-3956 severity moderate: SUSE including 1 source package names (nodejs), 1 product×package rows across 1 product lines (SUSE Studio Onsite 1.3): Known Not Affected 1. https://www.suse.com/security/cve/CVE-2016-3956/
ubuntu medium CVE-2016-3956 medium priority: Ubuntu including 1 source packages (npm), 19 status rows across 19 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, precise, trusty, upstream, wily, xenial, yakkety, zesty): not-affected 11, ignored 5, released 2, needs-triage 1. https://ubuntu.com/security/CVE-2016-3956

Affected software / configurations for CVE-2016-3956

Vendor Product Version Raw CPE
ibm sdk <= 1.1.0.20 cpe:2.3:a:ibm:sdk:*:*:*:*:*:nodejs:*:*
ibm sdk <= 1.2.0.10 cpe:2.3:a:ibm:sdk:*:*:*:*:*:nodejs:*:*
ibm sdk <= 4.4.1.0 cpe:2.3:a:ibm:sdk:*:*:*:*:*:nodejs:*:*
nodejs node.js 0.10.0 cpe:2.3:a:nodejs:node.js:0.10.0:*:*:*:*:*:*:*
nodejs node.js 0.10.1 cpe:2.3:a:nodejs:node.js:0.10.1:*:*:*:*:*:*:*
nodejs node.js 0.10.2 cpe:2.3:a:nodejs:node.js:0.10.2:*:*:*:*:*:*:*
nodejs node.js 0.10.3 cpe:2.3:a:nodejs:node.js:0.10.3:*:*:*:*:*:*:*
nodejs node.js 0.10.4 cpe:2.3:a:nodejs:node.js:0.10.4:*:*:*:*:*:*:*
nodejs node.js 0.10.5 cpe:2.3:a:nodejs:node.js:0.10.5:*:*:*:*:*:*:*
nodejs node.js 0.10.6 cpe:2.3:a:nodejs:node.js:0.10.6:*:*:*:*:*:*:*
nodejs node.js 0.10.7 cpe:2.3:a:nodejs:node.js:0.10.7:*:*:*:*:*:*:*
nodejs node.js 0.10.8 cpe:2.3:a:nodejs:node.js:0.10.8:*:*:*:*:*:*:*
nodejs node.js 0.10.9 cpe:2.3:a:nodejs:node.js:0.10.9:*:*:*:*:*:*:*
nodejs node.js 0.10.10 cpe:2.3:a:nodejs:node.js:0.10.10:*:*:*:*:*:*:*
nodejs node.js 0.10.11 cpe:2.3:a:nodejs:node.js:0.10.11:*:*:*:*:*:*:*
nodejs node.js 0.10.12 cpe:2.3:a:nodejs:node.js:0.10.12:*:*:*:*:*:*:*
nodejs node.js 0.10.13 cpe:2.3:a:nodejs:node.js:0.10.13:*:*:*:*:*:*:*
nodejs node.js 0.10.14 cpe:2.3:a:nodejs:node.js:0.10.14:*:*:*:*:*:*:*
nodejs node.js 0.10.15 cpe:2.3:a:nodejs:node.js:0.10.15:*:*:*:*:*:*:*
nodejs node.js 0.10.16 cpe:2.3:a:nodejs:node.js:0.10.16:*:*:*:*:*:*:*
nodejs node.js 0.10.16-isaacs-manual cpe:2.3:a:nodejs:node.js:0.10.16-isaacs-manual:*:*:*:*:*:*:*
nodejs node.js 0.10.17 cpe:2.3:a:nodejs:node.js:0.10.17:*:*:*:*:*:*:*
nodejs node.js 0.10.18 cpe:2.3:a:nodejs:node.js:0.10.18:*:*:*:*:*:*:*
nodejs node.js 0.10.19 cpe:2.3:a:nodejs:node.js:0.10.19:*:*:*:*:*:*:*
nodejs node.js 0.10.20 cpe:2.3:a:nodejs:node.js:0.10.20:*:*:*:*:*:*:*
nodejs node.js 0.10.21 cpe:2.3:a:nodejs:node.js:0.10.21:*:*:*:*:*:*:*
nodejs node.js 0.10.22 cpe:2.3:a:nodejs:node.js:0.10.22:*:*:*:*:*:*:*
nodejs node.js 0.10.23 cpe:2.3:a:nodejs:node.js:0.10.23:*:*:*:*:*:*:*
nodejs node.js 0.10.24 cpe:2.3:a:nodejs:node.js:0.10.24:*:*:*:*:*:*:*
nodejs node.js 0.10.25 cpe:2.3:a:nodejs:node.js:0.10.25:*:*:*:*:*:*:*
nodejs node.js 0.10.26 cpe:2.3:a:nodejs:node.js:0.10.26:*:*:*:*:*:*:*
nodejs node.js 0.10.27 cpe:2.3:a:nodejs:node.js:0.10.27:*:*:*:*:*:*:*
nodejs node.js 0.10.28 cpe:2.3:a:nodejs:node.js:0.10.28:*:*:*:*:*:*:*
nodejs node.js 0.10.29 cpe:2.3:a:nodejs:node.js:0.10.29:*:*:*:*:*:*:*
nodejs node.js 0.10.30 cpe:2.3:a:nodejs:node.js:0.10.30:*:*:*:*:*:*:*
nodejs node.js 0.10.31 cpe:2.3:a:nodejs:node.js:0.10.31:*:*:*:*:*:*:*
nodejs node.js 0.10.32 cpe:2.3:a:nodejs:node.js:0.10.32:*:*:*:*:*:*:*
nodejs node.js 0.10.33 cpe:2.3:a:nodejs:node.js:0.10.33:*:*:*:*:*:*:*
nodejs node.js 0.10.34 cpe:2.3:a:nodejs:node.js:0.10.34:*:*:*:*:*:*:*
nodejs node.js 0.10.35 cpe:2.3:a:nodejs:node.js:0.10.35:*:*:*:*:*:*:*
nodejs node.js 0.10.36 cpe:2.3:a:nodejs:node.js:0.10.36:*:*:*:*:*:*:*
nodejs node.js 0.10.37 cpe:2.3:a:nodejs:node.js:0.10.37:*:*:*:*:*:*:*
nodejs node.js 0.10.38 cpe:2.3:a:nodejs:node.js:0.10.38:*:*:*:*:*:*:*
nodejs node.js 0.10.39 cpe:2.3:a:nodejs:node.js:0.10.39:*:*:*:*:*:*:*
nodejs node.js 0.10.40 cpe:2.3:a:nodejs:node.js:0.10.40:*:*:*:*:*:*:*
nodejs node.js 0.10.41 cpe:2.3:a:nodejs:node.js:0.10.41:*:*:*:*:*:*:*
nodejs node.js 0.12.0 cpe:2.3:a:nodejs:node.js:0.12.0:*:*:*:*:*:*:*
nodejs node.js 0.12.1 cpe:2.3:a:nodejs:node.js:0.12.1:*:*:*:*:*:*:*
nodejs node.js 0.12.2 cpe:2.3:a:nodejs:node.js:0.12.2:*:*:*:*:*:*:*
nodejs node.js 0.12.3 cpe:2.3:a:nodejs:node.js:0.12.3:*:*:*:*:*:*:*
nodejs node.js 0.12.4 cpe:2.3:a:nodejs:node.js:0.12.4:*:*:*:*:*:*:*
nodejs node.js 0.12.5 cpe:2.3:a:nodejs:node.js:0.12.5:*:*:*:*:*:*:*
nodejs node.js 0.12.6 cpe:2.3:a:nodejs:node.js:0.12.6:*:*:*:*:*:*:*
nodejs node.js 0.12.7 cpe:2.3:a:nodejs:node.js:0.12.7:*:*:*:*:*:*:*
nodejs node.js 0.12.8 cpe:2.3:a:nodejs:node.js:0.12.8:*:*:*:*:*:*:*
nodejs node.js 0.12.9 cpe:2.3:a:nodejs:node.js:0.12.9:*:*:*:*:*:*:*
nodejs node.js 4.0.0 cpe:2.3:a:nodejs:node.js:4.0.0:*:*:*:*:*:*:*
nodejs node.js 4.1.0 cpe:2.3:a:nodejs:node.js:4.1.0:*:*:*:*:*:*:*
nodejs node.js 4.1.1 cpe:2.3:a:nodejs:node.js:4.1.1:*:*:*:*:*:*:*
nodejs node.js 4.1.2 cpe:2.3:a:nodejs:node.js:4.1.2:*:*:*:*:*:*:*
nodejs node.js 4.2.0 cpe:2.3:a:nodejs:node.js:4.2.0:*:*:*:*:*:*:*
nodejs node.js 4.2.1 cpe:2.3:a:nodejs:node.js:4.2.1:*:*:*:*:*:*:*
nodejs node.js 4.2.2 cpe:2.3:a:nodejs:node.js:4.2.2:*:*:*:*:*:*:*
nodejs node.js 4.2.3 cpe:2.3:a:nodejs:node.js:4.2.3:*:*:*:*:*:*:*
nodejs node.js 4.2.4 cpe:2.3:a:nodejs:node.js:4.2.4:*:*:*:*:*:*:*
nodejs node.js 4.2.5 cpe:2.3:a:nodejs:node.js:4.2.5:*:*:*:*:*:*:*
nodejs node.js 4.2.6 cpe:2.3:a:nodejs:node.js:4.2.6:*:*:*:*:*:*:*
nodejs node.js 4.3.0 cpe:2.3:a:nodejs:node.js:4.3.0:*:*:*:*:*:*:*
nodejs node.js 4.3.1 cpe:2.3:a:nodejs:node.js:4.3.1:*:*:*:*:*:*:*
nodejs node.js 4.3.1 cpe:2.3:a:nodejs:node.js:4.3.1:rc.1:*:*:*:*:*:*
nodejs node.js 4.3.1 cpe:2.3:a:nodejs:node.js:4.3.1:rc.2:*:*:*:*:*:*
nodejs node.js 4.3.2 cpe:2.3:a:nodejs:node.js:4.3.2:*:*:*:*:*:*:*
nodejs node.js 4.4.0 cpe:2.3:a:nodejs:node.js:4.4.0:*:*:*:*:*:*:*
nodejs node.js 4.4.0 cpe:2.3:a:nodejs:node.js:4.4.0:rc.1:*:*:*:*:*:*
nodejs node.js 4.4.0 cpe:2.3:a:nodejs:node.js:4.4.0:rc.2:*:*:*:*:*:*
nodejs node.js 4.4.0 cpe:2.3:a:nodejs:node.js:4.4.0:rc.3:*:*:*:*:*:*
nodejs node.js 4.4.0 cpe:2.3:a:nodejs:node.js:4.4.0:rc.4:*:*:*:*:*:*
nodejs node.js 4.4.1 cpe:2.3:a:nodejs:node.js:4.4.1:*:*:*:*:*:*:*
nodejs node.js 5.0.0 cpe:2.3:a:nodejs:node.js:5.0.0:*:*:*:*:*:*:*
nodejs node.js 5.1.0 cpe:2.3:a:nodejs:node.js:5.1.0:*:*:*:*:*:*:*

References for CVE-2016-3956

cvelogic Threat Intelligence