Unrated
Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart
Parsing a multipart form can bypass memory limits and read an arbitrarily long line into memory when the remaining limit at the start of a part is less than 400 bytes.
Announced Source revision 1
Original source ↗CVE-2026-94440
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-94440
net/textproto
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
mime/multipart
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Go standard library",
"product": "net/textproto",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.26.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "1.27.0-0",
"lessThan": "1.27.2",
"versionType": "semver"
}
],
"packageName": "net/textproto",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "readMIMEHeader"
},
{
"name": "Reader.readContinuedLineSlice"
},
{
"name": "Reader.ReadContinuedLine"
},
{
"name": "Reader.ReadContinuedLineBytes"
},
{
"name": "Reader.ReadMIMEHeader"
}
]
},
{
"vendor": "Go standard library",
"product": "mime/multipart",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.26.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "1.27.0-0",
"lessThan": "1.27.2",
"versionType": "semver"
}
],
"packageName": "mime/multipart",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "Part.populateHeaders"
},
{
"name": "Reader.readForm"
},
{
"name": "Reader.NextPart"
},
{
"name": "Reader.NextRawPart"
},
{
"name": "Reader.ReadForm"
}
]
}
]- Related CVEs
- CVE-2026-94440
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #16343 · Revision 1
- Added to Heist Feed
- Publisher date