Update dependency joi to v17.13.6 [SECURITY] - #5036
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This PR contains the following updates:
17.13.3→17.13.6joi has an uncaught RangeError on deeply nested input through recursive
link()schemasCVE-2026-48038 / GHSA-q7cg-457f-vx79
More information
Details
Impact
Denial of service via untrapped exception in services validating user-supplied JSON / object input with recursive link schemas.
The blast radius depends on how the application invokes joi:
validate()called withouttry/catchin a request handler would cause an unhandled exception, potentially crashing the process.validateAsync()orvalidate()inside atry/catch, the validation fails, but the error type isRangeErrorrather than a structuredValidationError, complicating error handling.Patches
Upgrade to version >= 18.2.1.
Workarounds
Try/catch the validation to avoid uncaught exceptions.
References
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
joi: object().rename() with a template target can set the validated object's prototype
CVE-2026-84367 / GHSA-gg4h-3hg2-grpc
More information
Details
Impact
Applications are affected only if a schema renames keys with a regular-expression source and a
Joi.expression()/Joi.x()target that interpolates the pattern's own match data, combined with{ multiple: true }, for example.rename(/^x-(.+)$/, Joi.x('{#​1}'), { multiple: true }). Because the target is rendered from the matched input key, an attacker who controls input keys can sendx-__proto__with an object value and make the rename target render as__proto__, which sets the prototype of the object joi returns instead of creating a key on it. The globalObject.prototypeis not modified, so the effect is confined to the object returned by that onevalidate()call.Schemas using a static string rename target are not affected, and neither are schemas left on the default
{ multiple: false }.Patches
Versions 17.13.5 and 18.2.4 have been released to address the issue.
Workarounds
__proto__, using a negative lookahead:.rename(/^x-(?!__proto__$)(.+)$/, Joi.x('{#​1}'), { multiple: true })Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
joi: Prototype pollution via a
__proto__language key in custom messagesCVE-2026-84368 / GHSA-6w3j-5fw6-r9vr
More information
Details
Impact
An application that passes attacker-controlled data into joi's custom message configuration (
messages(),message(),prefs({ messages }),Joi.extend({ messages })orrule({ message })) lets the attacker write properties ontoObject.prototype, where every object in the process then inherits them. A key named__proto__was treated as a language name, and the code reused the object it found at that key, which resolves to the prototype rather than to a new own property; a key namedconstructordid the same to theObjectfunction's statics. A consuming application that gates on the mere presence of a property (if (user.isAdmin)) can be made to take the wrong branch for every object it inspects.This is not reachable from data that joi validates. Custom messages are schema-construction configuration, normally written by the application developer. Exploitation therefore requires an application that feeds untrusted input straight into schema construction.
Patches
Upgrade to version 18.2.5 or 17.13.6.
Workarounds
Do not pass untrusted input into
messages(),message(),prefs({ messages }),Joi.extend({ messages })orrule({ message }). Or validate that they don't contain any__proto__orconstructorproperty.Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
hapijs/joi (joi)
v17.13.6Compare Source
v17.13.5Compare Source
v17.13.4Compare Source
Configuration
📅 Schedule: (UTC)
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
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