CVE-2026-94440

UNKNOWN 0.0

Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	go standard library
Product	net/textproto
Published	Oct 8, 2026

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Affected Versions

Go standard library / net/textproto

0 < 1.26.9 1.27.0-0 < 1.27.2

Go standard library / mime/multipart

0 < 1.26.9 1.27.0-0 < 1.27.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/cl/847307 go.dev: https://go.dev/issue/81741 groups.google.com: https://groups.google.com/g/golang-announce/c/U2fTuyDJznI pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-6608

Credits

Jakub Ciolek (https://ciolek.dev)