compression vulnerable to Denial of Service via memory leak on premature response close
At a glance
Severity
HIGH 7.5
EPSS
EPSS 0.48 % · percentile 41 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
openjs
NVD status
Awaiting Analysis
Description
compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the available memory and crashing the server. All applications using compression are affected. The issue is fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later.
