Security readout for executives and security teams
Plain-English summary
CVE-2021-40899 is a denial-of-service issue in repo-git-downloader v0.1.1. A crafted invalid Git repository can trigger inefficient regular expression behavior, potentially tying up processing resources. The public record does not provide severity, CVSS, or a vendor fix.
Executive priority
Treat this as a targeted availability risk until exposure is confirmed. Prioritize systems that process external repository inputs, but avoid emergency severity claims because the public record lacks scoring and exploitation evidence.
Technical view
The CVE describes a Regular Expression Denial of Service vulnerability in repo-git-downloader v0.1.1 during handling of crafted invalid Git repositories. No CVSS, CWE, CPE, or patch details are provided in the supplied sources.
Likely exposure
Exposure is most likely where repo-git-downloader v0.1.1 is installed and used to process untrusted or user-supplied Git repository inputs.
Exploitation context
The supplied sources do not report active exploitation, and KEV is false. The described attack context requires a crafted invalid Git repository being processed by the vulnerable package.
Researcher notes
The record is sparse: it names ReDoS in repo-git-downloader v0.1.1 but provides no CVSS, CWE, CPE, or remediation detail. Scope by actual package use and untrusted repository processing paths.
Mitigation direction
- Inventory systems and repositories for repo-git-downloader v0.1.1.
- Check upstream or vendor guidance for fixed versions or replacement recommendations.
- Restrict processing of untrusted Git repository inputs where feasible.
- Run repository download tasks with resource limits and isolation.
Validation and detection
- Search dependency manifests and SBOMs for repo-git-downloader v0.1.1.
- Identify services that accept user-supplied Git repository URLs or archives.
- Review logs for repository download timeouts, high CPU, or worker exhaustion.
- Confirm any upgraded or replacement package no longer flags CVE-2021-40899.
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-2021-40899 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/repo-git-downloader.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.