Threats affecting pkg:npm/joi

A denial of service vulnerability exists in the joi library's string email validation when using the multiple option. The email validation splits input strings using a regular expression that performs in quadratic time on long runs of whitespace, causing the Node.js event loop to block for several seconds with large whitespace inputs. This affects joi versions from 16.0.0 through 17.13.8 and 18.0.0 through 18.3.0. The issue is fixed in joi versions 17.13.9 and 18.3.1.

A vulnerability in the Joi validation library's isoDate string validation allows an attacker to cause a denial of service by sending a specially crafted string. The issue arises from a quadratic regular-expression backtracking problem that causes the validation to stall for a time proportional to the square of the input length. This can lead to significant application delays or stalls. Fixed versions are available in Joi 17.13.7 and 18.2.6.

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.