TI-2023-09723 Aliases CVE-2023-23925 GHSA-wqxw-8h5g-hq56

Switcher Client contains Regular Expression Denial of Service (ReDoS)

MEDIUM 44CWE-1333Published 2023-02-03 · Updated 2025-03-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: Low · Low · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

Switcher Client is a JavaScript SDK to work with Switcher API which is cloud-based Feature Flag. Unsanitized input flows into Strategy match operation (EXIST), where it is used to build a regular expression. This may result in a Regular expression Denial of Service attack (reDOS). This issue has been patched in version 3.1.4. As a workaround, avoid using Strategy settings that use REGEX in conjunction with EXIST and NOT_EXIST operations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00541 45th percentileScored 2026-11-07

Fix Fixed switcher-client-master (switcherapi): 3.1.4switcher-client (npm): 3.1.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
switcherapi	switcher-client-master	before 3.1.4	3.1.4	Patch available	CNA
—	switcher-client (npm)	before 3.1.4	3.1.4	Patch available	GHSA-wqxw-8h5g-hq56

switcher-client-master Vendorswitcherapi Affected before 3.1.4 Fixed in 3.1.4 Patch available CNA
switcher-client (npm) Vendor— Affected before 3.1.4 Fixed in 3.1.4 Patch available GHSA-wqxw-8h5g-hq56

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:switcherapi:switcher_client::::::node.js::*	before 3.1.4	Vulnerable	switcherapi

cpe:2.3:a:switcherapi:switcher_client:*:*:*:*:*:node.js:*:* Versions before 3.1.4 Vulnerable ·switcherapi

Remediation

Fix · CNA switcher-client-master (switcherapi) Fixed in 3.1.4
Fix · GHSA-wqxw-8h5g-hq56 switcher-client (npm) Fixed in 3.1.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-23925
2026-10-03 Alias added: GHSA-wqxw-8h5g-hq56

References

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences