CVE-2026-42507: medium-severity vulnerability in Go standard library net/textproto
Arbitrary inputs are included in errors without any escaping in net/textproto
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.4%
When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products
Go standard library · net/textprotoRelated CVEs — Go standard library net/textproto
In the same product, most dangerous first.
CVE-2023-24534HIGHExcessive memory allocation in net/http and net/textprotoEPSS 1.9%CVE-2023-24536HIGHExcessive resource consumption in net/http, net/textproto and mime/multipartEPSS 1.5%CVE-2023-45290MEDIUMMemory exhaustion in multipart form parsing in net/textproto and net/httpEPSS 1.2%CVE-2025-61724MEDIUMExcessive CPU consumption in Reader.ReadResponse in net/textprotoEPSS 0.6%CVE-2026-94440HIGHMemory limit bypass when parsing MIME headers in net/textproto, mime/multipartEPSS 0.5%