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CVE Record

CVE-2021-29061: A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Vfsjfilechooser2 version 0.2...

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Vfsjfilechooser2 version 0.2.9 and below which occurs when the application attempts to validate crafted URIs.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-29061 is a denial-of-service issue in Vfsjfilechooser2. A crafted URI can trigger excessive regular-expression processing during validation, potentially making an affected application slow or unresponsive. The sources do not show data theft, code execution, or confirmed active exploitation.

Executive priority

Treat this as an availability risk for systems using this niche component. Prioritize if the affected application processes user-controlled URIs or supports critical workflows. The available evidence does not support emergency response claims.

Technical view

The CVE describes a Regular Expression Denial of Service condition in Vfsjfilechooser2 version 0.2.9 and below, reached when validating crafted URIs. Public metadata does not provide CVSS, CWE, detailed affected CPEs, or a complete vendor remediation statement in the provided bundle.

Likely exposure

Exposure is most likely in applications that bundle or depend on Vfsjfilechooser2 0.2.9 or earlier and pass untrusted or user-controlled URI values into its validation path. Internet exposure depends on how the host application accepts URI input.

Exploitation context

The CVE is not listed as KEV in the provided bundle, and no cited source here confirms active exploitation. Public proof-of-concept references are listed, so researchers should treat the bug as reproducible without assuming real-world exploitation.

Researcher notes

The source bundle is sparse: no CVSS vector, CWE, CPEs, or explicit fix version is provided. The GitHub issue, commit, release, and PoC references should be reviewed to confirm root cause, patch status, and regression-test expectations.

Mitigation direction

  • Inventory applications and libraries for Vfsjfilechooser2 usage.
  • Identify any deployments using version 0.2.9 or earlier.
  • Review the project issue, release, and commit references for vendor remediation guidance.
  • Restrict untrusted URI input reaching affected validation paths where feasible.
  • Monitor application availability and error telemetry around URI handling.

Validation and detection

  • Check dependency manifests and packaged artifacts for Vfsjfilechooser2.
  • Confirm the deployed Vfsjfilechooser2 version in each affected application.
  • Review code paths that validate user-controlled URIs.
  • Verify whether referenced upstream changes are present in your build.
  • Record compensating controls if upgrade guidance remains unclear.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2021-29061 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.