Skip to content
Fencer Vulns
high 7.5

CVE-2026-87776 json

compression vulnerable to Denial of Service via memory leak on premature response close

published 2026-09-11 58 d ago modified 2026-10-05 34 d ago also GHSA-vc2v-76pw-4v95 , EUVD-2026-76072

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

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 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.

Patch / fix

  • npm compression 1.8.2
  • compression compression 1.8.2
  • node-compression Debian 14 1.8.2+~1.8.1-1

debian advisories DEBIAN-CVE-2026-87776

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-87776 updated cvss 7.5

compression: compression: Denial of Service via memory leak on premature response close

  • Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel8, workload-availability/node-healthcheck-rhel9-operator, workload-availability/node-healthcheck-operator-bundle, workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-agentic-console-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9, openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9
    affected: workaround, no fix available “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat Ansible Automation Platform 2 automation-controller 4.5.35-1.el9ap, automation-eda-controller 1.0.10-0.1.20260317.git9cae940.el8ap
    affected: workaround, no fix planned “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat build of Apache Camel - HawtIO 4 rhaf-hawtio-maven-repository.zip 4.4.0.GA Red Hat Build of Podman Desktop rh-podman-desktop.git 1.1.0 Red Hat Ceph Storage 4 rhceph/rhceph-4-dashboard-rhel8 Red Hat Data Grid 8 redhat-datagrid-maven-repository.zip 8.6.1.CR1
    affected: workaround, no fix available “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9
    affected: workaround, no fix available, no fix planned “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat Fuse 7 compression 1.7.4
    affected: workaround, no fix planned “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-operator-rhel9, rhoai/odh-mod-arch-agent-ops-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9
    affected: workaround, no fix available “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat OpenShift GitOps microshift-gitops 1.19.2-36.el9, openshift-gitops-argocd-cli 1.19.2-36.el9
    affected: workaround, no fix planned “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat Trusted Artifact Signer rhtas/rekor-search-ui-rhel9
    affected: workaround, no fix available “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
show 22 more
  • Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: workaround, no fix planned “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.”
  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1790254963
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:72712
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1790256405, ansible-automation-platform/bootc-automation-portal-rhel9 1792641102
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:72722
  • Red Hat Ansible Automation Platform 2.6 for RHEL 9 automation-platform-ui 2.6.15-1.el9ap
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:87004
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1791311495, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend 1791242697, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator-backend 1791251282
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:76788
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1789677459
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:69289
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1791853281
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:85846
  • Red Hat OpenShift AI 2.25 rhoai/odh-dashboard-rhel9 1791853525, rhoai/odh-feature-server-rhel9 1792148523, rhoai/odh-mod-arch-model-registry-rhel9 1791853432, rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791288400
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:87410
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1791861020, rhoai/odh-mod-arch-maas-rhel9 1791860708, rhoai/odh-feature-server-rhel9 1791863220, rhoai/odh-mod-arch-automl-rhel9 1791861032, rhoai/odh-mod-arch-gen-ai-rhel9 1791861479, rhoai/odh-mod-arch-mlflow-rhel9 1791861383, +4 more
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:84734
  • Red Hat OpenShift AI 3.5 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791825469
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:86891
  • Red Hat Quay 3.9 quay/quay-rhel8 1790808443
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:77656
  • Red Hat Quay 3.10 quay/quay-rhel8 1791462428
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:79366
  • Red Hat Quay 3.12 quay/quay-rhel8 1791314514
    fixed: vendor fix “Update the compression middleware to version 1.8.2 or later. No supported workaround is currently available if the affected version cannot be updated.” RHSA-2026:79546
  • Red Hat Gatekeeper 3 gatekeeper/gatekeeper-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9-operator, openshift-service-mesh/kiali-operator-bundle Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8
    not affected: component not present
  • Red Hat AMQ Broker 7 amq-broker-bin.zip, amq-broker-maven-repository.zip 7.14.1.CR3
    not affected: vulnerable code not in execute path
  • Red Hat Ansible Automation Platform 2 automation-gateway 2.5.20260824-1.el8ap, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, ansible-automation-platform-26/lightspeed-rhel9 Red Hat Ansible Automation Platform 2.6 for RHEL 9 receptor 1.6.9-1.el9ap, molecule 26.10.0-1.el9ap, receptorctl 1.6.9-1.el9ap, ansible-lint 26.10.1-1.el9ap, ansible-rulebook 1.2.3-1.el9ap, automation-hub 4.11.15-1.el9ap, +51 more Red Hat Ansible Automation Platform 2.6 for RHEL 10 receptor 1.6.9-1.el10ap, molecule 26.10.0-1.el10ap, python-cffi 2.0.0-2.el10ap, receptorctl 1.6.9-1.el10ap, python3-cffi 2.0.0-2.el10ap, ansible-lint 26.10.1-1.el10ap, +11 more
    not affected: vulnerable code not present
  • Red Hat build of Apache Camel for Spring Boot 4 rhaf-camel-spring-boot-maven-repository.zip, rhaf-camel-for-springboot-maven-repository.zip
    not affected: component not present
  • Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1791219676, rhdh/rhdh-operator-bundle 1791315788, rhdh/rhdh-must-gather-rhel9 1788278523, rhdh/rhdh-rag-content-rhel9 1791168570, rhdh/red-hat-developer-hub-backstage-plugin-lightspeed 1791242743, rhdh/red-hat-developer-hub-backstage-plugin-orchestrator 1791250003, +3 more Red Hat Discovery 2 discovery/discovery-server-rhel9 1789675186
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 pcs, grafana, pcs-snmp, grafana-loki, grafana-mssql, grafana-mysql, +12 more
    not affected: component not present
  • Red Hat Enterprise Linux 9 pcs, grafana, pcs-snmp, dotnet6.0, dotnet7.0, dotnet-host, +22 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 10 pcs 0.12.0-3.el10_0.5, grafana 10.2.6-28.el10_2.5
    not affected: component not present

10 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
58 d ago

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm compression
<1.8.2
1.8.2

Affected products

  • compression compression

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime
  • CWE-459 Incomplete Cleanup

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.