CVE-2025-48997: high-severity vulnerability in expressjs multer
Multer vulnerable to Denial of Service via unhandled exception
Published
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 8.7epss 0.5%
Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability that is present starting in version 1.4.4-lts.1 and prior to version 2.0.1 allows an attacker to trigger a Denial of Service (DoS) by sending an upload file request with an empty string field name. This request causes an unhandled exception, leading to a crash of the process. Users should upgrade to `2.0.1` to receive a patch. No known workarounds are available.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
expressjs · multerRelated CVEs — expressjs multer
In the same product, most dangerous first.
CVE-2026-3520HIGHMulter vulnerable to Denial of Service via uncontrolled recursionEPSS 0.8%CVE-2025-47944HIGHMulter vulnerable to Denial of Service from maliciously crafted requestsEPSS 0.8%CVE-2025-7338HIGHMulter vulnerable to Denial of Service via unhandled exception from malformed requestEPSS 0.8%CVE-2025-47935HIGHMulter vulnerable to Denial of Service via memory leaks from unclosed streamsEPSS 0.8%CVE-2026-3304HIGHMulter vulnerable to Denial of Service via incomplete cleanupEPSS 0.7%CVE-2026-2359HIGHMulter vulnerable to Denial of Service via resource exhaustionEPSS 0.7%