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  4. CVE 2026 123871 nodejs is vulnerable to proxy credential
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Back to active CVEs
Medium · CVSS 6.2CVE-2026-123871

Node.js is vulnerable to proxy credential disclosure via ERR_PROXY_INVALID_CONFIG error messagesCVE-2026-123871

Answer in brief

CVE-2026-123871 records a Medium severity (CVSS 6.2) vulnerability in Node.js is vulnerable to proxy credential disclosure via ERR_PROXY_INVALID_CONFIG error messages. The current sources do not mark it as known exploited. The current feed maps nodejs/node (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 11, 2026Updated Nov 11, 2026Source checked Nov 11, 2026First seen by HOL Nov 11, 2026Material review Nov 11, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps nodejs/node (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
nodejs/nodegeneric>=0.0.0 <22.23.5 || >=23.0.0 <24.22.3 || >=25.0.0 <26.13.122.23.5, 24.22.3, 26.13.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for nodejs/node.
  2. 2Review the reported fix. Update nodejs/node to 22.23.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 11, 2026

Sources and claim methodology

  • Source referencecna.openjsf.org
  • Source referencenodejs.org
Upstream source description

Node.js discloses proxy credentials in ERR_PROXY_INVALID_CONFIG error messages. CVE-2026-48615 established that a proxy credential must not appear in a Node.js error message and redacted the username and password from ProxyConfig.href, but that fix missed four error paths in the same subsystem, one of them inside the same constructor, which interpolate the raw proxy URL, credentials included, into an ERR_PROXY_INVALID_CONFIG message. The proxy URL comes from the environment, but the defect is the sink: a secret that Node.js redacts everywhere else is emitted verbatim into a much wider audience than the process environment, such as stderr, container logs, log aggregation, and crash reporting services. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Node.js is vulnerable to a heap buffer overflow in HTTP/2 session.altsvc() via a long originSame nodejs/node package
  • Node.js is vulnerable to Permission Model file-name disclosure via recursive fs.watchSame nodejs/node package
  • Node.js is vulnerable to a zlib denial of service via a stream destroy during a pending params() callSame nodejs/node package
  • Node.js is vulnerable to a remote HTTP/2 denial of service via a reachable assertion in Http2Session teardownSame nodejs/node package
  • Node.js is vulnerable to cross-connection memory disclosure via TLS write re-entrancy in the HTTPS request parserSame nodejs/node package
  • Node.js is vulnerable to an HTTP/2 memory and file-descriptor leak via a protocol error during session shutdownSame nodejs/node package

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-209
Source
CVE List V5
Source checked
Nov 11, 2026
References
2 linked sources
Open source record