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v3.1.9

Security

This security release fixes four URI parsing and normalization vulnerabilities in fast-uri 3.x. Applications that process untrusted URI input should upgrade to v3.1.9.

• Medium — URI scheme spoofing through percent-encoded schemes (GHSA-w74x-v6f9-j3xg, CVE-2026-110306): percent-encoded scheme input is now rejected instead of being decoded into a live scheme.
• Medium — Host confusion during domain-host canonicalization (GHSA-wjr9-j795-jxcr, CVE-2026-110180): malformed domain hosts containing ambiguous delimiters or stripped control characters are now rejected instead of being silently rewritten.
• Low — Incorrect relative-reference normalization (GHSA-xhq7-xmqj-769h, CVE-2026-110095): dot-segment removal now preserves the resolution semantics of relative references.
• Low — Scheme injection in suffix references (GHSA-333x-w4r6-6crp, CVE-2026-110725): first-segment colons in path-only suffix references are now escaped so the output is not reparsed as a scheme.

Upgrade with:

npm install [email protected]

Thanks to @​zekth for reporting the scheme, host, and relative-reference issues, and to @​UlisesGascon for finding the suffix-reference issue and reviewing the remediations.

What's Changed

• ci: enable trusted publishing releases (v3.x) by @​mcollina in fastify/fast-uri#229

Full Changelog: fastify/fast-uri@v3.1.8...v3.1.9

v3.1.8

⚠️ Security Warning

This security release fixes the following medium-severity security advisory:

• GHSA-hrr3-gc8f-f4qj — inconsistent host case normalization via percent-encoded octets

Users of the v3.x release line should upgrade to v3.1.8.

Full Changelog: fastify/fast-uri@v3.1.7...v3.1.8

• 0def703 Bumped v3.1.9
• a1d0da2 test: generate only relative path references
• 9eb8759 fix: preserve relative paths in suffix and relative resolution
• 54c30f7 docs: note suffix-reference authority ambiguity
• 39e6493 fix: escape a first-segment colon in suffix references
• 745183c test: cover first-segment colon in suffix references
• ddfc6a5 fix(SEC-03): reject non reg-name characters in domain hosts
• d86a8d2 fix: keep a colon-first segment behind "./" in relative normalization
• eb483b5 test: cover colon-first relative references in normalization
• b110a35 fix(SEC-02): preserve meaning of relative references during normalization
• Additional commits viewable in compare view

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