fast-uri 4.2.3

Source: https://github.com/fastify/fast-uri
Tag scanned: v4.2.3
Compared with: v4.2.2 (0 signals introduced since)
Files: 44 scanned, 5 skipped (binary, oversized, or unrecognised)
Signals: 0 critical · 0 warn · 8 info
Scan time: 0.1 s
LLM review: LLM review by claude-haiku-5-5 (Anthropic): nothing at warn or critical to review.
Disclude version: 4.1.0
Scanned (UTC): 2026-10-22 20:00

Signals

Ordered by severity, then signals introduced in this release. Hidden characters are shown as ⟨U+…⟩.

info unicode-surrogate lib/schemes.js:284:57

orphaned high surrogate \uD800 (no matching low surrogate) (token pass, confidence 0.65)

  const escaped = chars.replace(/[\\\]^-]/gu, '\\$&')
  const cls = allowNonAscii ? `[${escaped}]|[^\\0-\\x7F\\uD800-\\uDFFF]` : `[${escaped}]`
  return { all: new RegExp(`^(?:${cls})*$`, 'u'), table, allowNonAscii }
}

info unicode-surrogate lib/schemes.js:284:65

orphaned low surrogate \uDFFF (no preceding high surrogate) (token pass, confidence 0.65)

  const escaped = chars.replace(/[\\\]^-]/gu, '\\$&')
  const cls = allowNonAscii ? `[${escaped}]|[^\\0-\\x7F\\uD800-\\uDFFF]` : `[${escaped}]`
  return { all: new RegExp(`^(?:${cls})*$`, 'u'), table, allowNonAscii }
}

info unicode-mixed-script test/component-safe-serialization.test.js:145:33

identifier `Kſ` mixes scripts: Other + Latin (in string/comment) (raw pass, confidence 0.40)

  t.equal(
    fastURI.serialize({ query: 'Kſ' }),
    '?%E2%84%AA%C5%BF',
    'Unicode characters that case-fold to ASCII are still UTF-8 encoded'

info unicode-surrogate test/parse.test.js:387:17

orphaned high surrogate \uD800 (no matching low surrogate) (token pass, confidence 0.65)
```
  // the generic query/path normalizers no longer run to do it.
  const lone = '\uD800'
  const trailing = '\uDC00'
```
info unicode-surrogate test/parse.test.js:388:21

orphaned low surrogate \uDC00 (no preceding high surrogate) (token pass, confidence 0.65)
```
  const lone = '\uD800'
  const trailing = '\uDC00'

  t.deepEqual(
```

info unicode-mixed-script test/reserved-path-normalization.test.js:45:43

identifier `Kſ` mixes scripts: Other + Latin (in string/comment) (raw pass, confidence 0.40)

  t.equal(
    fastURI.normalize('http://example.com/Kſ'),
    'http://example.com/%E2%84%AA%C5%BF',
    'UTF-8 encodes Unicode characters that case-fold to ASCII'

info unicode-mixed-script test/reserved-path-normalization.test.js:89:33

identifier `Kſ` mixes scripts: Other + Latin (in string/comment) (raw pass, confidence 0.40)
```
  t.equal(
    fastURI.serialize({ path: '/Kſ' }),
    '/%E2%84%AA%C5%BF',
    'UTF-8 encodes Unicode characters that case-fold to ASCII'
```
info unicode-mixed-script test/scheme-validation.test.js:17:4

identifier `Kttp` mixes scripts: Other + Latin (in string/comment) (raw pass, confidence 0.40)
```
  'éxample:value',
  'Kttp://example.com/',
  'ſcheme:value',
  // RFC 3986 section 3.1 does not allow percent-encoding in a scheme.
```

Reproduce This Scan

Run disclude locally to verify. Add --format sarif for SARIF output. Add --llm (with an API key in the environment) to include the LLM review.

cargo install disclude --version 4.1.0
git clone https://github.com/fastify/fast-uri fast-uri && cd fast-uri
git checkout v4.2.3
disclude scan --severity info --diff v4.2.2 .