Security readout for executives and security teams
Plain-English summary
CVE-2021-40898 is a denial-of-service issue in scaffold-helper v1.2.0. A specially crafted invalid file can cause expensive regular-expression processing during copying, potentially slowing or hanging the affected process. The public record is sparse and does not name a patch, CVSS score, or affected platform details.
Executive priority
Treat as a targeted availability risk until exposure is confirmed. It is not enough evidence for emergency response, but teams should quickly verify whether scaffold-helper v1.2.0 exists in build or file-processing workflows.
Technical view
The CVE describes a Regular Expression Denial of Service vulnerability in scaffold-helper v1.2.0 when copying crafted invalid files. It likely affects file-copy or scaffolding workflows that parse filenames or content with vulnerable regex logic. The bundle provides no CWE, CVSS vector, CPE, fixed version, or vendor advisory.
Likely exposure
Exposure appears limited to environments using scaffold-helper v1.2.0 in workflows that copy untrusted or malformed files. The sources do not identify package ecosystem, runtime context, downstream products, or internet-facing attack surface.
Exploitation context
No active exploitation is stated; the CVE is not listed as KEV in the provided bundle. The described condition requires crafted invalid files reaching scaffold-helper’s copy path. Sources do not provide exploit maturity, public PoC status, or real-world incident evidence.
Researcher notes
The record is minimal: affected vendor/product fields are not populated, severity is unknown, and only one repository reference is listed. Analysis should focus on confirming component presence and whether attacker-controlled files can reach the vulnerable copy behavior.
Mitigation direction
- Inventory projects for scaffold-helper v1.2.0 usage.
- Check upstream project guidance for fixed versions or workarounds.
- Avoid copying untrusted invalid files through affected workflows.
- Use process timeouts or resource limits around scaffolding jobs.
- Replace or remove the component if no maintained fix exists.
Validation and detection
- Search dependency manifests and lockfiles for scaffold-helper v1.2.0.
- Identify CI, build, or developer workflows that copy user-supplied files.
- Review logs for CPU spikes or hangs during scaffold-helper copy operations.
- Check the CVE record and upstream repository for updated remediation information.
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.
CVE-2021-40898 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/yetingli/SaveResults/blob/main/js/scaffold-helper.jsCVE reference · x_refsource_MISC
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.