chore(deps): update dependency multer to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
multer	1.4.5-lts.1 → 2.4.0
@types/multer (source)	1.4.8 → 2.2.0

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Release Notes

expressjs/multer (multer)

v2.4.0

Compare Source

• Fix CVE-2026-88932 (GHSA-3pph-fpjx-jg34)
• Add filename to LIMIT_FILE_SIZE and LIMIT_UNEXPECTED_FILE errors (#​1416)
• Accept a function for limits, called with the request, to set limits per request (#​1133)
• Add opt-in flush option to DiskStorage to fsync files before the callback runs (#​1458)
• Expose busboy's defCharset, highWaterMark and fileHwm options (#​1465)
• Add streamHandler option to feed busboy from pre-consumed bodies (Google Cloud Functions, Firebase) (#​1466)
• Allow multer.diskStorage() to be called without options (#​1471)
• Decode WHATWG-escaped characters (%0A, %0D, %22) in field names, matching file.originalname since 2.3.0: req.body keys, file.fieldname and err.field now carry the real name. If you matched the escaped spelling as a workaround, use the real name now (#​1473)
• Report the decoded filename in err.filename on LIMIT_FILE_SIZE errors, matching file.originalname (#​1478)
• Reject non-integer or negative limits values at construction time; a float limit silently disabled the check (#​1395, #​1335)
• Accept requests with exactly limits.parts parts; LIMIT_PART_COUNT now fires only when the limit is exceeded. If you set parts one higher to work around this, you can drop the extra one (#​1446)
• Files skipped by fileFilter no longer count towards maxCount (#​1426)
• Change the LIMIT_UNEXPECTED_FILE message to "Unexpected file field" (#​426)
• Remove the concat-stream dependency (#​1356)
• Docs: add JSDoc to the public API and document the storage engine stream contract (#​1467, #​1468)
• Docs: add FormData upload examples (#​896)
• Docs: remove the translated READMEs (#​1463)
• Internal: run the test suite on macOS (#​1464)

v2.3.0

Compare Source

• Fix CVE-2026-77078 (GHSA-wc9g-mqfw-jrwm)
• Fix CVE-2026-77037 (GHSA-qfvm-cv95-jqjf)
• Fix CVE-2026-77063 (GHSA-qvfw-j98x-7q72)
• Fix CVE-2026-82333 (GHSA-535w-7cp7-47q4)
• Add MulterError codes INVALID_FIELD_NAME and STREAM_DESTROYED
• Add opt-in limits.fieldArrayIndexLimit to bound numeric array indexes in field names (#​1438)
• Accept files whose size is exactly limits.fileSize (#​1407)
• Preserve the caller's async context (AsyncLocalStorage) when calling next() (#​1124)
• Decode WHATWG-escaped characters (%0A, %0D, %22) in file.originalname (#​1421)
• Do not crash when fileFilter invokes its callback more than once (#​1427)
• Use a fallback message for MulterError codes without a mapping (#​1448)
• Docs: clarify preservePath and parts, use crypto.randomBytes in the DiskStorage example (#​1414, #​1430, #​1436)
• Docs: add Indonesian, Japanese and Tamil translations and refresh all translations from the current README (#​1431, #​1354, #​1462)
• Internal: run the test suite on Windows (#​1334)

v2.2.0

Compare Source

• Fix CVE-2026-5038 (GHSA-3p4h-7m6x-2hcm)
• Fix CVE-2026-5079 (GHSA-72gw-mp4g-v24j)

v2.1.1

Compare Source

• Fix CVE-2026-3520 (GHSA-5528-5vmv-3xc2)
• fix error/abort handling

v2.1.0

Compare Source

• Add defParamCharset option for UTF-8 filename support (#​1210)
• Fix CVE-2026-2359 (GHSA-v52c-386h-88mc)
• Fix CVE-2026-3304 (GHSA-xf7r-hgr6-v32p)

v2.0.2

Compare Source

• Fix CVE-2025-7338 (GHSA-fjgf-rc76-4x9p)

v2.0.1

Compare Source

• Fix CVE-2025-48997 (GHSA-g5hg-p3ph-g8qg)

v2.0.0

Compare Source

• Breaking change: The minimum supported Node version is now 10.16.0
• Fix CVE-2025-47935 (GHSA-44fp-w29j-9vj5)
• Fix CVE-2025-47944 (GHSA-4pg4-qvpc-4q3h)

v1.4.5-lts.2

Compare Source

• Fix out-of-band error event from busboy (#​1177)

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