{"id":"CVE-2026-87776","title":"compression is a Node.js and Express compression middleware","summary":"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 destro…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401","CWE-459","CWE-772"],"vendor":"compression","product":"compression","affected":["compression < 1.8.2"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:40:00.317","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87776","references":[{"url":"https://cna.openjsf.org/security-advisories.html","label":"ce714d77-add3-4f53-aff5-83d477b104bb"},{"url":"https://github.com/expressjs/compression/security/advisories/GHSA-vc2v-76pw-4v95","label":"ce714d77-add3-4f53-aff5-83d477b104bb"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87776.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-87776"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531852"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87776"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87776"},{"url":"https://access.redhat.com/errata/RHSA-2026:69289"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00363,"epssPercentile":0.30144,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-11T13:30:04.865391Z"},"ingestedAt":"2026-09-11T16:45:47.860Z","patched":["discovery 2"],"slug":"CVE-2026-87776","body":"## Overview\n\ncompression 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Migration Toolkit for Containers, Node HealthCheck Operator, OpenShift Lightspeed, OpenShift Pipelines, Red Hat Ansible Automation Platform 2, Red Hat build of Apache Camel - HawtIO 4, … · no fix planned: Red Hat Ansible Automation Platform 2, Red Hat Fuse 7, Secrets Management Console for Red Hat OpenShift, Red Hat Ceph Storage 4, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87776.json)\n- **RHSA-2026:69289** · Red Hat · fixed in: Red Hat Discovery 2 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69289)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}