CVE-2026-118772

Source
https://cve.org/CVERecord?id=CVE-2026-118772
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118772.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-118772
Aliases
Downstream
CGA (30)
CLSA (2)
ECHO (1)
ROOT (1)
Published
2026-10-29T18:13:33Z
Modified
2026-11-05T02:31:01Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
joi: quadratic-time split in `string().email({ multiple: true })` allows denial of service
Details

joi is a schema description language and data validator for JavaScript. From 17.1.1 until 17.13.9 and 18.3.1, the Joi.string().email({ multiple: true }) rule uses a separator regular expression whose leading whitespace quantifier is retried at every position in a long whitespace run that contains no separator, causing quadratic work during String.prototype.split. The behavior applies to the default separator and every custom separator. Applications that validate attacker-controlled values with the multiple option and no effective prior length limit can have the Node.js event loop blocked for seconds by one request, preventing other work. A .max() rule is not sufficient when abortEarly: false allows the email rule to run after the maximum-length check fails. This vulnerability is fixed in versions 17.13.9 and 18.3.1.

Database specific
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118772.json"
}
References

Affected packages

Git / github.com/hapijs/joi

Affected ranges

Type
GIT
Repo
https://github.com/hapijs/joi
Events
Database specific
Show details
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "16.0.0"
                },
                {
                    "last_affected": "17.1.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "18.0.0"
                },
                {
                    "fixed": "18.3.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "03dc1d909818503b06240dadc81e9227ed2649cf"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "807858d7480f5075b0610817e3e44230890fb18e"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v17.13.9",
            "range": [
                {
                    "fixed": "5af45306226782035951fdc49f10fab5ebe021a2"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "v18.3.1",
            "range": [
                {
                    "fixed": "4009bfb93639b7da53b7cb1de2e2d8617d36d5f5"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v16.*
v16.0.0
v16.0.1
v16.1.0
v16.1.1
v16.1.2
v16.1.3
v16.1.4
v16.1.5
v16.1.6
v16.1.7
v16.1.8
v17.*
v17.0.0
v17.0.1
v17.0.2
v17.1.0
v17.1.1
v18.*
v18.0.0
v18.0.1
v18.0.2
v18.1.0
v18.1.1
v18.1.2
v18.2.0
v18.2.1
v18.2.2
v18.2.3
v18.2.4
v18.2.5
v18.2.6
v18.2.7
v18.2.8
v18.2.9
v18.3.0

Database specific

source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118772.json"