CVE-2021-29469
Potential exponential regex in monitor mode
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Potential exponential regex in monitor mode
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.
- Record
CVE-2021-29469- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2021-0743
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.
- Record
EUVD-2021-0743- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-35q2-47q7-3pc3
Node-Redis potential exponential regex in monitor mode
Impact
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.
Patches
The problem was fixed in commit 2d11b6d and was released in version 3.1.1.
References
#1569 (GHSL-2021-026)
- Record
GHSA-35q2-47q7-3pc3- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-29469- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-29469- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-29469
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.
- Record
DEBIAN-CVE-2021-29469- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-35q2-47q7-3pc3
Node-Redis potential exponential regex in monitor mode
Impact
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.
Patches
The problem was fixed in commit 2d11b6d and was released in version 3.1.1.
References
#1569 (GHSL-2021-026)
- Record
GHSA-35q2-47q7-3pc3- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-29469
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.
- Record
UBUNTU-CVE-2021-29469- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1776818209 No score
TuxCare security update for redis (1 CVE)
TuxCare rebuilt redis to address 1 CVE. Fixed in 2.8.0-tuxcare.1.
- Record
CLSA-2026-1776818209- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
redisnpm |
2.6.0 up to 3.1.1 | 3.1.1 |
redisTuxCare:npm |
2.8.0-tuxcare.0 up to 2.8.0-tuxcare.1, plus listed versions 2.8.0 |
2.8.0-tuxcare.1 |
node-redisDebian:12 |
before 3.0.2+~cs5.18.1-3 | 3.0.2+~cs5.18.1-3 |
node-redisDebian:13 |
before 3.0.2+~cs5.18.1-3 | 3.0.2+~cs5.18.1-3 |
node-redisDebian:14 |
before 3.0.2+~cs5.18.1-3 | 3.0.2+~cs5.18.1-3 |
node-redisUbuntu:16.04:LTS |
All versions, plus listed versions 0.12.1-2 |
None known |
node-redisUbuntu:18.04:LTS |
All versions, plus listed versions 0.12.1-2 |
None known |
node-redisUbuntu:20.04:LTS |
All versions, plus listed versions 2.8.0-13.0.2-1 |
None known |
node-redisUbuntu:22.04:LTS |
All versions, plus listed versions 3.0.2+~cs5.18.1-33.1.2+~cs6.15.1-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-29469 is a medium vulnerability (CVSS 5.3) in Noderedis Node-redis, published April 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.63%, the 76th percentile. Fixed in redis 3.1.1.
References
github.com/NodeRedis/node-redis/security/advisories/GHSA-35q2-47q7-3pc3
security.netapp.com/advisory/ntap-20210611-0010
nvd.nist.gov/vuln/detail/CVE-2021-29469