CVE-2021-29061: A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in Vfsjfilechooser2 version 0.2.9

Q: How do I fix CVE-2021-29061?

vfsjfilechooser2: upgrade to newer than 0.2.9. Exact commands for each OS are on this page.

Q: Is CVE-2021-29061 being exploited?

CVE-2021-29061 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-29061 affect?

CVE-2021-29061 affects vfsjfilechooser2. Severity is high (CVSS 7.5). 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.

Q: How urgent is CVE-2021-29061?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-29061 is a high-severity flaw (CVSS 7.5) affecting vfsjfilechooser2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-770
Published	2021-06-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vfsjfilechooser2 project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-21 20:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

vfsjfilechooser2 project vfsjfilechooser2 UPGRADE

Affected: <= 0.2.9

Fixed in: newer than 0.2.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vfsjfilechooser2 || rpm -q vfsjfilechooser2 || vfsjfilechooser2 --version

2. UPGRADE to newer than 0.2.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vfsjfilechooser2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vfsjfilechooser2

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-29061?

vfsjfilechooser2: upgrade to newer than 0.2.9. Exact commands for each OS are on this page.

Is CVE-2021-29061 being exploited?

CVE-2021-29061 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-29061 affect?

CVE-2021-29061 affects vfsjfilechooser2. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2021-29061?

Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs