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Fencer Intel
high 8.8

CVE-2018-1098 json

etcd Cross-site Request Forgery (CSRF)

published 2018-04-03 8 y ago modified 2026-06-17 4 mo ago also GHSA-5gjm-fj42-x983 , EUVD-2022-0838

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

A cross-site request forgery flaw was found in etcd 3.3.1 and earlier. An attacker can set up a website that tries to send a POST request to the etcd server and modify a key. Adding a key is done with PUT so it is theoretically safe (can't PUT from an HTML form or such) but POST allows creating in-order keys that an attacker can send.

Patch / fix

  • go go.etcd.io/etcd/v3 3.4.0
  • etcd Debian 14, Debian 13, Debian 12 3.4.23-1

debian advisories DEBIAN-CVE-2018-1098

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-2018-1098 updated cvss 6.5

etcd: Cross-site request forgery via crafted local POST forms

  • Red Hat Enterprise Linux 7 etcd, etcd3
    affected: workaround, no fix planned “Configure and enable authentication on the etcd server.”
  • Red Hat OpenShift Enterprise 3 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +13 more
    affected: workaround, no fix available “Configure and enable authentication on the etcd server.”
  • Red Hat Storage 3 etcd
    affected: workaround, no fix planned “Configure and enable authentication on the etcd server.”

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

Exploit prediction

1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/coreos/etcd/issues/9353 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go go.etcd.io/etcd/v3
<3.4.0
3.4.0

Affected products

  • Red Hat, Inc. etcd

Classification

Weakness
  • CWE-352 Cross-Site Request Forgery

References

Sources

Fencer Intel 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.