Security readout for executives and security teams
Plain-English summary
CVE-2021-26504 is a directory traversal issue in Foddy node-red-contrib-huemagic 3.0.0. A remote attacker may be able to retrieve sensitive files through a crafted request handled by res.sendFile in hue-magic.js. The source bundle does not provide a CVSS score, patch version, or active exploitation evidence.
Executive priority
Treat this as an exposure-driven information disclosure risk. Prioritize internet-facing or partner-facing Node-RED systems first, especially where file contents could expose credentials, tokens, or operational data. Lack of scoring means urgency should be based on deployment reachability.
Technical view
The reported flaw is improper path handling in hue-magic.js where res.sendFile is involved. The CVE description says crafted requests can lead to sensitive information disclosure. Public metadata identifies node-red-contrib-huemagic 3.0.0, but affected CPEs, CWE mapping, scoring, and remediation details are incomplete in the provided sources.
Likely exposure
Exposure is most likely in Node-RED environments that have node-red-contrib-huemagic 3.0.0 installed and expose the affected HTTP functionality to untrusted networks. The bundle does not prove broader version impact or default exposure.
Exploitation context
The bundle does not cite CISA KEV listing or public active exploitation. It describes remote attacker access using crafted requests, but provides no confirmed exploit maturity, observed campaigns, or weaponization evidence.
Researcher notes
Public evidence is sparse: no CVSS vector, no CWE, no CPEs, and no named fixed release appear in the bundle. Analysis should focus on version confirmation, route exposure, and vendor issue tracking without assuming unaffected versions or a universal patch path.
Mitigation direction
- Inventory Node-RED deployments for node-red-contrib-huemagic 3.0.0.
- Check the vendor repository or package source for official remediation guidance.
- Restrict external access to Node-RED and HueMagic-related endpoints.
- Remove or disable the package where it is not operationally required.
- Monitor access logs for unusual file retrieval attempts.
Validation and detection
- Confirm whether node-red-contrib-huemagic 3.0.0 is installed.
- Identify whether affected Node-RED routes are reachable from untrusted networks.
- Review hue-magic.js usage of res.sendFile in deployed code.
- Check vendor issue 217 for remediation or maintainer guidance.
- Verify compensating access controls around Node-RED administrative and HTTP endpoints.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
File access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-26504 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Foddy/node-red-contrib-huemagic/issues/217CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.