CVE-2023-45290: medium-severity vulnerability in Go standard library net/textproto
Memory exhaustion in multipart form parsing in net/textproto and net/http
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 1.2%
When parsing a multipart form (either explicitly with Request.ParseMultipartForm or implicitly with Request.FormValue, Request.PostFormValue, or Request.FormFile), limits on the total size of the parsed form were not applied to the memory consumed while reading a single form line. This permits a maliciously crafted input containing very long lines to cause allocation of arbitrarily large amounts of memory, potentially leading to memory exhaustion. With fix, the ParseMultipartForm function now correctly limits the maximum size of form lines.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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-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%CVE-2026-42507MEDIUMArbitrary inputs are included in errors without any escaping in net/textprotoEPSS 0.4%