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Fencer Vulns
high 7.5

CVE-2026-77301 json

adm-zip: Uncontrolled memory allocation via the declared uncompressed size (DoS)

published 2026-09-18 51 d ago modified 2026-09-24 45 d ago also GHSA-7q85-xj36-vmfc , EUVD-2026-83170

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

adm-zip is a JavaScript library for creating and extracting ZIP archives in Node.js. Prior to 0.6.1, getData() in zipEntry.js trusts an entry's central-directory uncompressed size and allocates output memory before validating that value against the actual compressed data and decompression result. A small crafted ZIP can declare a multi-gigabyte uncompressed size, causing Buffer.alloc and decompression handling to commit excessive resident memory before CRC validation reports an error. Applications that read entries from untrusted archives can therefore be terminated by the operating system or suffer service-wide memory exhaustion. This issue is fixed in version 0.6.1.

Patch / fix

  • npm adm-zip 0.6.1

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-2026-77301 updated cvss 6.5

adm-zip: adm-zip: Denial of Service via uncontrolled memory allocation

  • Red Hat Advanced Cluster Management for Kubernetes 2 redhat-user-workloads/volsync-tenant/volsync-0-12, redhat-user-workloads/volsync-tenant/volsync-bundle-0-12
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Build of Podman Desktop rh-podman-desktop
    affected: workaround, no fix available
  • Red Hat Fuse 7 adm-zip 0.4.14
    affected: workaround, no fix planned “Out of support scope”
  • 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 Container Platform 4 openshift4/ose-monitoring-plugin-rhel9
    affected: workaround, no fix available
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/monitoring-console-plugin-rhel9 1793663585, cluster-observability-operator/monitoring-console-plugin-rhel9 1793827684, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9 1793662327, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9 1793827768, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9 1793661280, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9 1793830320, +8 more
    fixed: vendor fix RHSA-2026:95591
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1792523640
    fixed: vendor fix RHSA-2026:86675
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1793001801, rhoai/odh-mod-arch-maas-rhel9 1793001859, rhoai/odh-mod-arch-automl-rhel9 1793001841, rhoai/odh-mod-arch-gen-ai-rhel9 1793001896, rhoai/odh-mod-arch-mlflow-rhel9 1793001851, rhoai/odh-mod-arch-autorag-rhel9 1793001850, +2 more
    fixed: vendor fix RHSA-2026:92510
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1793661985, cluster-observability-operator/perses-rhel9 1793825744, cluster-observability-operator/thanos-rhel9 1793660568, cluster-observability-operator/thanos-rhel9 1793821585, cluster-observability-operator/korrel8r-rhel9 1793661297, cluster-observability-operator/korrel8r-rhel9 1793822079, +30 more Red Hat Cost Management On Premise costmanagement/costmanagement-ui-rhel10 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9, rhacm2/volsync-operator-bundle Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9
    not affected: vulnerable code not present
show 3 more
  • Red Hat Enterprise Linux 8 mozjs60 Red Hat Enterprise Linux 9 gjs
    not affected: component not present
  • Red Hat OpenShift AI 3.4 rhoai/odh-cli-rhel9 1792722177, rhoai/rhai-cli-rhel9 1792722177, rhoai/odh-automl-rhel9 1792697253, rhoai/odh-mlflow-rhel9 1793002327, rhoai/odh-autorag-rhel9 1793265800, rhoai/odh-trainer-rhel9 1792817113, +92 more
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 openshift4/ose-console Red Hat OpenShift Container Platform 5 openshift5/ose-monitoring-plugin-rhel9
    not affected: vulnerable code not in execute path

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
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
51 d ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/cthackers/adm-zip/security/advisories/GHSA-7q85-xj36-vmfc referenced PoC, tagged "exploit" by a source, unverified

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 adm-zip
<0.6.1
0.6.1

Affected products

  • cthackers adm-zip

Classification

Weakness
  • CWE-789 Memory Allocation with Excessive Size Value

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.