Vulnerability-Lookup

GHSA-6H2X-M376-MQJQ

Vulnerability from github – Published: 2026-09-29 18:07 – Updated: 2026-10-05 23:31

Summary

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

Details

Impact

Any application that validates a user-supplied string with Joi.string().isoDate() can be stalled by a single request. One of the regular expressions the rule runs over the input was unanchored, so a valid ISO date followed by a long run of fractional-second digits made the regex engine restart its search from every position in the string, costing time proportional to the square of the input length. 64 KB of digits costs about 1.4 s and 256 KB about 22 s.

Patches

Upgrade to version 17.13.7 or 18.2.6 depending on your current major version.

Workarounds

None except capping the length of the string before it reaches joi.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                  
                    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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "joi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "17.2.0"
            },
            {
              "fixed": "17.13.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "joi"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "18.0.0"
            },
            {
              "fixed": "18.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-92599"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-29T18:07:42Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nAny application that validates a user-supplied string with `Joi.string().isoDate()` can be stalled by a single request. One of the regular expressions the rule runs over the input was unanchored, so a valid ISO date followed by a long run of fractional-second digits made the regex engine restart its search from every position in the string, costing time proportional to the square of the input length. 64 KB of digits costs about 1.4 s and 256 KB about 22 s.\n\n### Patches\nUpgrade to version 17.13.7 or 18.2.6 depending on your current major version.\n\n### Workarounds\nNone except capping the length of the string before it reaches joi.",
  "id": "GHSA-6h2x-m376-mqjq",
  "modified": "2026-10-05T23:31:10Z",
  "published": "2026-09-29T18:07:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92599"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hapijs/joi/pull/3143"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hapijs/joi/pull/3145"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hapijs/joi/commit/115e7b58d5eaaecc5e9b7093d41899ad6fb053ec"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hapijs/joi/commit/e70df424c367f2976db63b089504413744a21245"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hapijs/joi"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "joi: Quadratic regular-expression backtracking in `Joi.string().isoDate()`"
}

CVE-2026-92599 (GCVE-0-2026-92599)

Vulnerability from cvelistv5 – Published: 2026-09-16 21:47 – Updated: 2026-09-18 20:06

Title

Joi before 17.13.7 and 18.2.6 ReDoS via isoDate

Summary

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.

Severity

8.7 (High)


                        
                          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

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 20:06 UTC

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 5285 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/hapijs/joi/security/advisories…	vendor-advisory
https://www.vulncheck.com/advisories/joi-before-1…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
hapijs	joi	Affected: 17.2.0 , < 17.13.7 (semver) Unaffected: 17.13.7 (semver)
hapijs	joi	Affected: 18.0.0 , < 18.2.6 (semver) Unaffected: 18.2.6 (semver)

Date Public

2026-09-02 00:00

Credits

qrn12580 yfwmaniish

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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