SB20261110285 - Inefficient regular expression complexity in i18next

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Main Vulnerability Database SB20261110285

SB20261110285 - Inefficient regular expression complexity in i18next

Published: November 10, 2026

Security Bulletin ID SB20261110285
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Inefficient regular expression complexity (CVE-ID: N/A)

CWE-ID: CWE-1333 - Inefficient Regular Expression Complexity

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service by blocking a server's event loop or hanging browser tabs.

The vulnerability exists due to exponential backtracking in the i18next nesting regular expression when processing strings containing an unclosed $t( prefix. A remote attacker can supply crafted interpolation values or translation keys containing the namespace separator to trigger excessive processing and block execution.


Remediation

Install update from vendor's website.

References