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CVE-2021-29469

Potential exponential regex in monitor mode

HIGH
7.5
CVSS Score
Published: April 23, 2021 at 06:10 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
2 products affected across 2 vendorsRedisJs Redis

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Redis· Redis Jsnpm
95%
v < 3.1.1
Affected range stops below 3.1.1, so it looks safe — our inference, not a vendor statement
Js Redis· Noderedis
60%
v < 3.1.1
Affected range stops below 3.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/NodeRedis/node-redis/commit/2d11b6dc9b9774464a91fb4b448bad8bf699629e
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/NodeRedis/node-redis/releases/tag/v3.1.1
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/NodeRedis/node-redis/security/advisories/GHSA-35q2-47q7-3pc3
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210611-0010/

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400NVD-CWE-Other

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