CVE-2023-24534: high-severity vulnerability in Go standard library net/textproto
Excessive memory allocation in net/http and net/textproto
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.9%
HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.
CVSS:3.1/AV:N/AC:L/PR:N/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-2023-24536HIGHExcessive 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-2026-94440HIGHMemory limit bypass when parsing MIME headers in net/textproto, mime/multipartEPSS 0.7%CVE-2025-61724MEDIUMExcessive CPU consumption in Reader.ReadResponse in net/textprotoEPSS 0.6%CVE-2026-42507MEDIUMArbitrary inputs are included in errors without any escaping in net/textprotoEPSS 0.4%