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Update dependency i18next to v26.4.4 - #12143

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@renovate renovate Bot commented Oct 10, 2026 •

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This PR contains the following updates:

Package Change Age Confidence
i18next (source) 26.4.2 → 26.4.4 age confidence

Release Notes

i18next/i18next (i18next)

v26.4.4

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  • fix(security): the nesting regexp no longer backtracks exponentially (ReDoS) on an unclosed $t(. Its repeated group had overlapping alternatives ([^()"']+ inside (?:...)*?, and inside parentheses [^()] also matched quotes), so a string containing $t( without a closing ) made the engine try every way to split the text: about 2x the runtime per extra character, and a ~25 character value hung t() for minutes. With the default config this was reachable through any interpolated value (t('greet', { name: '$t(aaaaaaaaaaaaaaaaaaaaaaaa' })): escaping does not touch $, t or (, and the skipOnVariables check runs the regexp on the interpolated result, so nest: false did not help either. Every alternative now starts with a different character (plain char, ", ' or (), so there is only one way to match and the cost is linear. Quoted strings and one level of parentheses in nesting options keep working (#​2336). The only difference: a lone " or ' inside unquoted parentheses within $t(...) is no longer matched. Affects 25.3.3 to 26.4.3. See advisory GHSA-5jr9-983r-c8x4, CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Thanks to Anisetti Chaitanya Eshwar Prasad for the responsible disclosure.
  • fix(security): nest() now resolves $t(...) in a single pass and no longer nests text that came out of a resolved value. Every nested lookup reset the shared nesting regexp, so the loop started over from the beginning of the string after each match. That had two effects. First, a $t(...) inside a variable that the nested lookup deliberately kept literal (default skipOnVariables: true) was resolved anyway by the outer loop: with outer: 'A $t(inner) B' and inner: 'Hi {{name}}', t('outer', { name: '$t(secret)' }) rendered the secret translation. It now stays A Hi $t(secret) B, the same as without the outer nesting; with skipOnVariables: false it is still resolved. Second, the cost was quadratic when an unclosed $t( preceded many nestings, which matters when an app passes untrusted input as the key itself (t(userInput)): 20,000 nestings took ~1.4 s, now ~25 ms. The resolved value is now sliced into the result instead of going through String.replace, so $&, $`, $' and $$ stay literal as before (26.4.2).

v26.4.3

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  • perf: ResourceStore.hasLanguageSomeTranslations() no longer enumerates every key of a large bundle on each call. It ran Object.keys() on the whole bundle just to learn whether it had at least one key, and init() / changeLanguage() reach it three times per instance (once while picking the language, twice via setResolvedLanguage()). With large flat bundles and one i18next instance per SSR request reusing the same resources, that showed up as measurable CPU work before any t() call. Bundle objects already found non-empty are now remembered in a WeakSet shared across instances, so later checks are O(1): 2,000 inits with a 6,800-key bundle went from ~750 ms to ~20 ms, the same as a one-key bundle. Only the non-empty result is cached. No API removes single keys from a bundle, so a non-empty bundle stays non-empty, and empty bundles are re-checked every time, so keys added later (backend loads, addResource, addResourceBundle, direct or silent changes) count right away. The only edge case: a bundle emptied by hand with delete on every key while it is still in the store keeps counting as having translations; use removeResourceBundle() for that. Thanks @​dmchoi77 for the detailed report (#​2449).

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@renovate
renovate Bot force-pushed the renovate/i18next-26.x branch 2 times, most recently from 846e9da to 8dc9c26 Compare October 12, 2026 11:01
@renovate renovate Bot changed the title Update dependency i18next to v26.4.3 Update dependency i18next to v26.4.4 Oct 12, 2026
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renovate Bot force-pushed the renovate/i18next-26.x branch 3 times, most recently from f5d656d to e48daac Compare October 13, 2026 06:27
@renovate
renovate Bot force-pushed the renovate/i18next-26.x branch from e48daac to 677b2df Compare October 13, 2026 08:48
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Code Coverage Report: Only Changed Files listed

Package Base Coverage New Coverage Difference
Overall Coverage 🟢 66.57% 🟢 66.57% ⚪ 0%

Minimum allowed coverage is 0%, this run produced 66.57%

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