chore(deps): bump i18next from 26.2.0 to 26.3.4

[dependabot]

Bumps i18next from 26.2.0 to 26.3.4.

Release notes

Sourced from i18next's releases.

v26.3.4

• fix(security): deepExtend (used by addResourceBundle(..., deep, overwrite)) no longer recurses into inherited properties. It checked key existence with the in operator, which walks the prototype chain, so a source key matching an inherited built-in (e.g. hasOwnProperty, toString) caused recursion into the shared Object.prototype function and, with overwrite: true, could overwrite e.g. Object.prototype.hasOwnProperty.call with a non-callable value — corrupting a shared built-in process-wide (DoS). Existence is now checked with Object.prototype.hasOwnProperty.call, so such keys are copied as plain own data instead. This complements the existing __proto__/constructor guard and is also strictly more correct for an own-property merge. Only affects applications that pass attacker-controlled data with deep: true and overwrite: true; no standard backend/integration does this. Distinct from CVE-2026-48713 / CVE-2026-48714 (different packages, setPath mechanism). Thanks to zx (Jace) for the responsible disclosure.

v26.3.3

• fix(types): selector t($ => $.arr, { returnObjects: true, context }) on a JSON array of heterogeneous objects now preserves each element's full shape (e.g. { transKey1: string; transKey2: string }[]) instead of collapsing to a union of partial element types. Two type-level causes: (1) FilterKeys evaluated the whole array element type at once, so keyof (A | B) only saw the keys common to every element — it now distributes over the object union and filters each element independently; (2) when TypeScript merges mismatched array element types it injects phantom optional undefined keys (e.g. transKey1_withContext?: undefined on elements that don't define it), which the context-detection helpers mistook for real context variants — they now skip keys typed as undefined. Also adds a dedicated context + returnObjects: true selector overload using const Fn + ReturnType<Fn>, so Target is no longer collapsed to unknown via ApplyTarget. Resolves Problem 1 of #2398 (Problem 2 was already fixed on master). Thanks @​sauravgupta-dotcom (#2438). Fixes #2398.

v26.3.2

• fix: chained formatters with a parenthesised option that contains the format separator (e.g. join(separator: ', ')) now work at any position in the chain, not just first. Previously the comma-in-parens reassembly only repaired formats[0], so {{v, uppercase, join(separator: ', ')}} split the join(...) option on the inner comma and never rejoined it, producing corrupt output. Replaced the first-position-only repair with a position-independent pass that re-joins fragments until each open paren closes. Thanks @​spokodev (#2437).

v26.3.1

• fix(types): t() with a keyPrefix no longer pollutes its return type with sibling keys' values. A regression in 26.3.0 — the [Res] extends [never] guards added to KeysBuilderWithReturnObjects / KeysBuilderWithoutReturnObjects turned the builders into deferred conditional types, so KeyPrefix<Ns> stopped resolving to a literal union and keyPrefix inference widened to the whole namespace. Symptom: useTranslation(ns, { keyPrefix: 'a.b' }) then t('title') would resolve to '<a.b>.title' | '<other.path>.title' | ... instead of just the scoped value. Affected every react-i18next user using keyPrefix. Restored to the eager 26.2.0 form. The same-namespace conflict handling from #2434 still works via _DropConflictKeys at the merge layer (in options.d.ts). Thanks @​aaronrosenthal (#2436).

v26.3.0

• feat(types): introduce ResourceNamespaceMap — a separate mergeable augmentation surface for namespace resource types, designed for monorepos where multiple packages each want to contribute their own namespaces. Previously, every package had to coordinate on a single CustomTypeOptions.resources declaration (or fall back to typing dependency namespaces as any) because resources is a single property of an interface and TypeScript reports TS2717 when two declarations of the same property disagree. The new interface merges naturally across declare module 'i18next' blocks, so each package can ship its own i18next.d.ts independently. Per-property merge handles same-namespace contributions from multiple packages, and same-key/different-literal conflicts are silently dropped to avoid poisoning t() overload resolution. Fully backwards-compatible — existing CustomTypeOptions.resources augmentations continue to work, and both surfaces can coexist. Scalar options (defaultNS, returnNull, enableSelector, etc.) still belong on CustomTypeOptions. Thanks @​sh3xu (#2434). Fixes #2409.

Changelog

Sourced from i18next's changelog.

26.3.4

• fix(security): deepExtend (used by addResourceBundle(..., deep, overwrite)) no longer recurses into inherited properties. It checked key existence with the in operator, which walks the prototype chain, so a source key matching an inherited built-in (e.g. hasOwnProperty, toString) caused recursion into the shared Object.prototype function and, with overwrite: true, could overwrite e.g. Object.prototype.hasOwnProperty.call with a non-callable value — corrupting a shared built-in process-wide (DoS). Existence is now checked with Object.prototype.hasOwnProperty.call, so such keys are copied as plain own data instead. This complements the existing __proto__/constructor guard and is also strictly more correct for an own-property merge. Only affects applications that pass attacker-controlled data with deep: true and overwrite: true; no standard backend/integration does this. Distinct from CVE-2026-48713 / CVE-2026-48714 (different packages, setPath mechanism). See advisory GHSA-6jcc-5g8w-32mx, CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H). Thanks to zx (Jace) @​manus-use for the responsible disclosure.

26.3.3

• fix(types): selector t($ => $.arr, { returnObjects: true, context }) on a JSON array of heterogeneous objects now preserves each element's full shape (e.g. { transKey1: string; transKey2: string }[]) instead of collapsing to a union of partial element types. Two type-level causes: (1) FilterKeys evaluated the whole array element type at once, so keyof (A | B) only saw the keys common to every element — it now distributes over the object union and filters each element independently; (2) when TypeScript merges mismatched array element types it injects phantom optional undefined keys (e.g. transKey1_withContext?: undefined on elements that don't define it), which the context-detection helpers mistook for real context variants — they now skip keys typed as undefined. Also adds a dedicated context + returnObjects: true selector overload using const Fn + ReturnType<Fn>, so Target is no longer collapsed to unknown via ApplyTarget. Resolves Problem 1 of #2398 (Problem 2 was already fixed on master). Thanks @​sauravgupta-dotcom (#2438). Fixes #2398.

26.3.2

• fix: chained formatters with a parenthesised option that contains the format separator (e.g. join(separator: ', ')) now work at any position in the chain, not just first. Previously the comma-in-parens reassembly only repaired formats[0], so {{v, uppercase, join(separator: ', ')}} split the join(...) option on the inner comma and never rejoined it, producing corrupt output. Replaced the first-position-only repair with a position-independent pass that re-joins fragments until each open paren closes. Thanks @​spokodev (#2437).

26.3.1

• fix(types): t() with a keyPrefix no longer pollutes its return type with sibling keys' values. A regression in 26.3.0 — the [Res] extends [never] guards added to KeysBuilderWithReturnObjects / KeysBuilderWithoutReturnObjects turned the builders into deferred conditional types, so KeyPrefix<Ns> stopped resolving to a literal union and keyPrefix inference widened to the whole namespace. Symptom: useTranslation(ns, { keyPrefix: 'a.b' }) then t('title') would resolve to '<a.b>.title' | '<other.path>.title' | ... instead of just the scoped value. Affected every react-i18next user using keyPrefix. Restored to the eager 26.2.0 form. The same-namespace conflict handling from #2434 still works via _DropConflictKeys at the merge layer (in options.d.ts). Thanks @​aaronrosenthal (#2436).

26.3.0

• feat(types): introduce ResourceNamespaceMap — a separate mergeable augmentation surface for namespace resource types, designed for monorepos where multiple packages each want to contribute their own namespaces. Previously, every package had to coordinate on a single CustomTypeOptions.resources declaration (or fall back to typing dependency namespaces as any) because resources is a single property of an interface and TypeScript reports TS2717 when two declarations of the same property disagree. The new interface merges naturally across declare module 'i18next' blocks, so each package can ship its own i18next.d.ts independently. Per-property merge handles same-namespace contributions from multiple packages, and same-key/different-literal conflicts are silently dropped to avoid poisoning t() overload resolution. Fully backwards-compatible — existing CustomTypeOptions.resources augmentations continue to work, and both surfaces can coexist. Scalar options (defaultNS, returnNull, enableSelector, etc.) still belong on CustomTypeOptions. Thanks @​sh3xu (#2434). Fixes #2409.

Commits

• 817ede5 26.3.4
• 46d0dd8 build
• 642137b fix(security): prevent deepExtend from recursing into inherited built-ins
• cf7080d 26.3.3
• 05fd7be build
• cc0bd80 changelog: 26.3.3 entry for #2438
• 9cbfa63 fix(types): preserve selector returnObjects shape with context (#2438)
• 3b04712 26.3.2
• fc20f5d changelog: 26.3.2 entry for #2437
• 6901e04 fix: reassemble comma-in-parens formatters at any chain position (#2437)
• Additional commits viewable in compare view

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