GHSA-mrx9-2rrp-rhpx

Duplicate Advisory: joi: Quadratic regular-expression backtracking in `Joi.string().isoDate()`

Published

2026-09-17

Modified

2026-10-05

Sources

github-advisory

Summary

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-6h2x-m376-mqjq.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 =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

Remediation: No patched version is listed by GitHub.

References

• https://github.com/advisories/GHSA-mrx9-2rrp-rhpx