CVE-2022-21671: @replit/crosis is a JavaScript client that speaks Replit's container protocol

Q: How do I fix CVE-2022-21671?

crosis: upgrade to 7.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2022-21671 being exploited?

CVE-2022-21671 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-2022-21671 affect?

CVE-2022-21671 affects crosis. Severity is high (CVSS 8.1). @replit/crosis is a JavaScript client that speaks Replit's container protocol. A vulnerability that involves exposure of sensitive information exists in versions prior to 7.3.1. When using this library as a way to programmatically communica

This month

HIGH 8.1UPGRADE

CVE-2022-21671 is a high-severity flaw (CVSS 8.1) affecting crosis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

@replit/crosis is a JavaScript client that speaks Replit's container protocol. A vulnerability that involves exposure of sensitive information exists in versions prior to 7.3.1. When using this library as a way to programmatically communicate with Replit in a standalone fashion, if there are multiple failed attempts to contact Replit through a WebSocket, the library will attempt to communicate using a fallback poll-based proxy. The URL of the pro

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-200
Published	2022-01-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: replit

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

Am I affected?

Timeline

2022-01-11 15:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

replit crosis UPGRADE

Affected: < 7.3.1

Fixed in: 7.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 7.3.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade crosis

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-2022-21671?

crosis: upgrade to 7.3.1. Exact commands for each OS are on this page.

Is CVE-2022-21671 being exploited?

CVE-2022-21671 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-2022-21671 affect?

CVE-2022-21671 affects crosis. Severity is high (CVSS 8.1). @replit/crosis is a JavaScript client that speaks Replit's container protocol. A vulnerability that involves exposure of sensitive information exists in versions prior to 7.3.1. When using this library as a way to programmatically communica

How urgent is CVE-2022-21671?

Priority 44/100. High severity

References

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