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Fencer Vulns
high 7.1

CVE-2026-73499 json

etcd: Watch API authorization bypass via open-ended range requests

published 2026-07-24 3 mo ago modified 2026-10-24 16 d ago also BIT-etcd-2026-73499 , EUVD-2026-57641 , GHSA-xg4h-6gfc-h4m8 , GO-2026-6114

cvss
7.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.

Patch / fix

  • go go.etcd.io/etcd/v3 3.5.33, 3.6.14, 3.7.1
  • bitnami etcd 3.5.33, 3.6.14, 3.7.1
  • go go.etcd.io/etcd/server/v3 3.5.33, 3.6.14, 3.7.1
  • etcd etcd 3.5.33, 3.6.14, 3.7.1
  • redhat etcd 3.5.33, 3.6.14, 3.7.1
  • govulncheck-vulndb SLES for SAP applications 16.0, SLES 16.0 0.0.20260827T195228-160000.1.1

suse advisories SUSE-SU-2026:23625-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260827T195228-160000.1.1

opensuse advisories openSUSE-SU-2026:21761-1

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-2026-73499 updated cvss 6.5

go.etcd.io/etcd: etcd: Information disclosure via Watch API authorization bypass

  • Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/observatorium-rhel9
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 openshift4/ose-etcd, openshift4/ose-etcd-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-etcd-rhel9 Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenStack Platform 16.2 etcd, etcd 3.7.1-0.1.hum1, rhosp-rhel8/openstack-etcd Red Hat OpenStack Platform 17.1 etcd, etcd 3.7.1-0.1.hum1
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 18.0 rhoso-operators/openstack-operator-bundle
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform/platform-operator-bundle Red Hat Ceph Storage 5 rhceph/snmp-notifier-rhel8 Red Hat Ceph Storage 6 rhceph/snmp-notifier-rhel9, rhceph/rhceph-promtail-rhel9 Red Hat Ceph Storage 7 rhceph/snmp-notifier-rhel9 Red Hat Ceph Storage 8 rhceph/snmp-notifier-rhel9 Red Hat Ceph Storage 9 rhceph/snmp-notifier-rhel10
    +2 more products
    Red Hat Hardened Images etcd 3.7.1-0.1.hum1 Red Hat OpenShift Container Platform 4 openshift4/oc-mirror-plugin-rhel9, openshift4/ose-baremetal-rhel8-operator, openshift4/ose-clusterresourceoverride-rhel8-operator
    not affected: vulnerable code not present

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
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
go go.etcd.io/etcd/v3
>=3.7.0-alpha.0, <3.7.1
>=3.6.0, <3.6.14
<3.5.33
3.7.1
3.6.14
3.5.33
bitnami etcd
<3.5.33
>=3.6.0, <3.6.14
>=3.7.0, <3.7.1
3.5.33
3.6.14
3.7.1
go go.etcd.io/etcd/server/v3
<3.5.33
>=3.6.0, <3.6.14
>=3.7.0-alpha.0, <3.7.1
3.5.33
3.6.14
3.7.1

Affected products

  • etcd-io etcd

Classification

Weakness

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.