NVD / CVE Program· CNA snyk

CVE-2021-23343: Regular Expression Denial of Service (ReDoS)

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 82.8% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: nodejs (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7, 1:12.22.5-1.module_el8.5.0+85+79a7b441; nodejs-devel (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7, 1:12.22.5-1.module_el8.5.0+85+79a7b441; nodejs-docs (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7.
Severity is disputed: the assigning authority (CNA) scores it 5.3, NVD 7.5.
Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to nodejs (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7, 1:12.22.5-1.module_el8.5.0+85+79a7b441; nodejs-devel (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7, 1:12.22.5-1.module_el8.5.0+85+79a7b441; nodejs-docs (AlmaLinux:8) 1:12.22.5-1.module_el8.4.0+2529+af52a4c7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

All versions of package path-parse are vulnerable to Regular Expression Denial of Service (ReDoS) via splitDeviceRe, splitTailRe, and splitPathRe regular expressions. ReDoS exhibits polynomial worst-case time complexity.

Published: May 4, 2021
Updated: Jun 16, 2026
EPSS: 2.2% · 82th percentile
CWE: —

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.2%

CNA vs NVD score

NVD: 7.5
CNA · snyk: 5.3; 2.2 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
path-parse project	path-parse	cpe:2.3:a:path-parse_project:path-parse

Versions reported by the vendor

Affected version ranges reported by the assigning authority (snyk). Independent of NVD's CPE analysis and usually ahead of it.

n/a path-parse
- before unspecifiedaffected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

path-parse project path-parsebefore 1.0.7

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

+60

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
almalinux:nodejs	1:12.22.5-1.module_el8.4.0+2529+af52a4c7 · AlmaLinux:8	Package registry (OSV)
almalinux:nodejs-devel	1:12.22.5-1.module_el8.5.0+85+79a7b441 · AlmaLinux:8	Package registry (OSV)
almalinux:nodejs-docs	1:12.22.5-1.module_el8.4.0+2529+af52a4c7 · AlmaLinux:8	Package registry (OSV)
almalinux:nodejs-full-i18n	1:12.22.5-1.module_el8.5.0+85+79a7b441 · AlmaLinux:8	Package registry (OSV)
almalinux:nodejs-nodemon	2.0.3-1.module_el8.4.0+2521+c668cc9f · AlmaLinux:8	Package registry (OSV)
almalinux:nodejs-packaging	17-3.module_el8.4.0+2224+b07ac28e · AlmaLinux:8	Package registry (OSV)
almalinux:npm	1:6.14.14-1.12.22.5.1.module_el8.4.0+2529+af52a4c7 · AlmaLinux:8	Package registry (OSV)
npm:path-parse	1.0.7	Package registry (OSV)
opensuse:nodejs10	10.24.1-150000.1.44.1 · openSUSE:Leap 15.3	Package registry (OSV)
opensuse:nodejs12	12.22.10-4.29.3 · openSUSE:Leap 15.3	Package registry (OSV)
opensuse:nodejs14	14.19.0-15.27.1 · openSUSE:Leap 15.3	Package registry (OSV)
opensuse:nodejs8	8.17.0-10.19.2 · openSUSE:Leap 15.3	Package registry (OSV)
red hat:ovirt-engine-ui-extensions	0:1.2.7-1.el8ev · Red Hat:rhev_manager:4.4:el8	Package registry (OSV)
red hat:rh-nodejs12-nodejs	0:12.22.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs12-nodejs-debuginfo	0:12.22.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs12-nodejs-devel	0:12.22.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs12-nodejs-docs	0:12.22.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs12-nodejs-nodemon	0:2.0.3-5.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-nodejs	0:14.17.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-nodejs-debuginfo	0:14.17.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-nodejs-devel	0:14.17.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-nodejs-docs	0:14.17.5-1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-nodejs-nodemon	0:2.0.3-5.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:rh-nodejs14-npm	0:6.14.14-14.17.5.1.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
rocky linux:nodejs	1:12.22.5-1.module+el8.4.0+647+e905fa21 · Rocky Linux:8	Package registry (OSV)
rocky linux:nodejs-nodemon	0:2.0.3-1.module+el8.6.0+982+9fdca2d4 · Rocky Linux:8	Package registry (OSV)
rocky linux:nodejs-packaging	0:17-3.module+el8.3.0+101+f84c7154 · Rocky Linux:8	Package registry (OSV)
suse:nodejs-common	2.0-3.4.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS	Package registry (OSV)
suse:nodejs10	10.24.1-1.46.1 · SUSE:Linux Enterprise Module for Web and Scripting 12	Package registry (OSV)
suse:nodejs10	10.24.1-150000.1.44.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Yeting Li

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-21-0963 · Dec 2, 2021(RedHat Güvenlik Güncellemesi)
TR-21-0779 · Sep 28, 2021(RedHat Güvenlik Güncellemesi)

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.apache.org/thread.html/r6a32cb3eda3b19096ad48ef1e7aa8f26e005f2f63765abb69ce08b85%40%3Cdev.myfaces.apache.org%3E

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	nodejs	before 1:12.22.5-1.module_el8.4.0+2529+af52a4c7	1:12.22.5-1.module_el8.4.0+2529+af52a4c7
AlmaLinux:8	nodejs	before 1:12.22.5-1.module_el8.5.0+85+79a7b441	1:12.22.5-1.module_el8.5.0+85+79a7b441
AlmaLinux:8	nodejs-devel	before 1:12.22.5-1.module_el8.4.0+2529+af52a4c7	1:12.22.5-1.module_el8.4.0+2529+af52a4c7
AlmaLinux:8	nodejs-devel	before 1:12.22.5-1.module_el8.5.0+85+79a7b441	1:12.22.5-1.module_el8.5.0+85+79a7b441
AlmaLinux:8	nodejs-docs	before 1:12.22.5-1.module_el8.4.0+2529+af52a4c7	1:12.22.5-1.module_el8.4.0+2529+af52a4c7
AlmaLinux:8	nodejs-full-i18n	before 1:12.22.5-1.module_el8.5.0+85+79a7b441	1:12.22.5-1.module_el8.5.0+85+79a7b441
AlmaLinux:8	nodejs-full-i18n	before 1:12.22.5-1.module_el8.4.0+2529+af52a4c7	1:12.22.5-1.module_el8.4.0+2529+af52a4c7
AlmaLinux:8	nodejs-nodemon	before 2.0.3-1.module_el8.4.0+2521+c668cc9f	2.0.3-1.module_el8.4.0+2521+c668cc9f
AlmaLinux:8	nodejs-packaging	before 17-3.module_el8.3.0+2023+d2377ea3	17-3.module_el8.3.0+2023+d2377ea3
AlmaLinux:8	nodejs-packaging	before 17-3.module_el8.4.0+2224+b07ac28e	17-3.module_el8.4.0+2224+b07ac28e
AlmaLinux:8	nodejs-packaging	before 23-3.module_el8.4.0+2522+3bd42762	23-3.module_el8.4.0+2522+3bd42762
AlmaLinux:8	nodejs-packaging	before 23-3.module_el8.5.0+254+b4526b16	23-3.module_el8.5.0+254+b4526b16
AlmaLinux:8	nodejs-packaging	before 17-3.module_el8.4.0+2521+c668cc9f	17-3.module_el8.4.0+2521+c668cc9f
AlmaLinux:8	npm	before 1:6.14.14-1.12.22.5.1.module_el8.4.0+2529+af52a4c7	1:6.14.14-1.12.22.5.1.module_el8.4.0+2529+af52a4c7
AlmaLinux:8	npm	before 1:6.14.14-1.12.22.5.1.module_el8.5.0+85+79a7b441	1:6.14.14-1.12.22.5.1.module_el8.5.0+85+79a7b441
npm	path-parse	before 1.0.7	1.0.7
openSUSE:Leap 15.3	nodejs10	before 10.24.1-150000.1.44.1	10.24.1-150000.1.44.1
openSUSE:Leap 15.3	nodejs12	before 12.22.10-4.29.3	12.22.10-4.29.3
openSUSE:Leap 15.3	nodejs14	before 14.19.0-15.27.1	14.19.0-15.27.1
openSUSE:Leap 15.3	nodejs8	before 8.17.0-10.19.2	8.17.0-10.19.2
Red Hat:enterprise_linux:8::appstream	nodejs	before 1:14.17.5-1.module+el8.4.0+12247+e2879e58	1:14.17.5-1.module+el8.4.0+12247+e2879e58
Red Hat:enterprise_linux:8::appstream	nodejs	before 1:12.22.5-1.module+el8.4.0+12242+af52a4c7	1:12.22.5-1.module+el8.4.0+12242+af52a4c7
Red Hat:enterprise_linux:8::appstream	nodejs-debuginfo	before 1:14.17.5-1.module+el8.4.0+12247+e2879e58	1:14.17.5-1.module+el8.4.0+12247+e2879e58
Red Hat:enterprise_linux:8::appstream	nodejs-debuginfo	before 1:12.22.5-1.module+el8.4.0+12242+af52a4c7	1:12.22.5-1.module+el8.4.0+12242+af52a4c7