Duplicate Advisory: joi: Quadratic regular-expression backtracking in `Joi.string().isoDate()`
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-6h2x-m376-mqjq.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.
GHSA-mrx9-2rrp-rhpx
Primary source · Revision 1 · Withdrawn
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GHSA-mrx9-2rrp-rhpx
joi
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "18.0.0"
}
]
}
],
"package": {
"name": "joi",
"purl": "pkg:npm/joi",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-mrx9-2rrp-rhpx/GHSA-mrx9-2rrp-rhpx.json",
"last_known_affected_version_range": "< 18.2.6"
}
}
]Publisher severity
high
Source reference: /database_specific/severity
- Event
- #85940 · Revision 1
- Added to Heist Feed
- Publisher date