CVE-2021-29469: Node-redis is a Node.js Redis client

Routine

MEDIUM 5.3UPGRADE

CVE-2021-29469 is a medium-severity flaw (CVSS 5.3) affecting redis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of service. The issue is patched in version 3.1.1.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-400
Published	2021-04-23
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: redis.js

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

Am I affected?

Timeline

2021-04-23 18:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

redis.js redis UPGRADE

Affected: < 3.1.1

Fixed in: 3.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls redis

2. UPGRADE to 3.1.1

npm install redis@">=3.1.1"

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-2021-29469?

redis: upgrade to 3.1.1. Exact commands for each OS are on this page.

Is CVE-2021-29469 being exploited?

CVE-2021-29469 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-2021-29469 affect?

CVE-2021-29469 affects redis. Severity is medium (CVSS 5.3). Node-redis is a Node.js Redis client. Before version 3.1.1, when a client is in monitoring mode, the regex begin used to detected monitor messages could cause exponential backtracking on some strings. This issue could lead to a denial of se

How urgent is CVE-2021-29469?

Priority 38/100. No elevated risk signals yet.

Software pages

Node.js vulnerabilities · Redis vulnerabilities

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References

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