---
id: GHSA-mrx9-2rrp-rhpx
title: >-
  Duplicate Advisory: joi: Quadratic regular-expression backtracking in
  `Joi.string().isoDate()`
summary: >-
  Duplicate Advisory: joi: Quadratic regular-expression backtracking in
  `Joi.string().isoDate()`
severity: high
cvss: 7.5
cwe:
  - CWE-1333
vendor: joi
product: joi
ecosystem: npm
affected:
  - 'joi >= 18.0.0, < 18.2.6'
published: '2026-09-17'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T23:30:50Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-mrx9-2rrp-rhpx'
references:
  - url: 'https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92599'
  - url: >-
      https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate
  - url: 'https://github.com/advisories/GHSA-mrx9-2rrp-rhpx'
tags:
  - ghsa
  - npm
ingestedAt: '2026-10-05T23:36:21.163Z'
---

## Overview

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-6h2x-m376-mqjq. This link is maintained to preserve external references.

## Original Description
joi (npm package `joi`, hapi.js) versions >=17.2.0 <17.13.7 and >=18.0.0 <18.2.6 are vulnerable to regular expression denial of service in the `Joi.string().isoDate()` validation rule. One of the regular expressions the rule applies to the input is unanchored, so a valid ISO date followed by a long run of fractional-second digits causes the regex engine to restart its search from every position in the string, yielding time proportional to the square of the input length (about 1.4 s for 64 KB of digits and about 22 s for 256 KB). A remote attacker who can supply a string to an isoDate validation can stall the application with a single request. Fixed in 17.13.7 and 18.2.6; as a workaround, cap the length of the string before it reaches joi.

## Affected packages

- `joi >= 18.0.0, < 18.2.6`

## Remediation

Refer to the advisory for the patched release.