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Fencer Vulns
high 7.5

CVE-2026-40983 json

Micrometer gRPC server instrumentation DoS vulnerability

published 2026-06-09 5 mo ago modified 2026-09-14 56 d ago also GHSA-w737-wx49-qj23 , EUVD-2026-35318

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 50%
public exploits
0
none known

Summary

In Micrometer, it is possible for a user to provide specially crafted gRPC requests that may cause a denial-of-service (DoS) condition.

Affected versions: Micrometer 1.16.0 through 1.16.5; 1.15.0 through 1.15.11.

Patch / fix

  • maven io.micrometer:micrometer-core 1.15.12, 1.16.6
  • Spring Micrometer 1.15.11.1, 1.16.5.1
  • Red Hat Red Hat build of Keycloak 26.6 26.6-11, 26.6.5-1
  • Red Hat Red Hat build of Keycloak 26.6.5 openshift-rhel9, rhel9-operator
  • Red Hat Red Hat OpenShift Dev Spaces 3.30 1787759145, 1787759723

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-2026-40983 updated cvss 7.5

micrometer: micrometer-core: Micrometer: Denial of Service via specially crafted gRPC requests

  • Red Hat build of Apache Camel - HawtIO 4 micrometer-core Red Hat build of Apache Camel 4 for Quarkus 3 micrometer-core
    affected: workaround, no fix available
  • Red Hat build of Apicurio Registry 3 micrometer-core
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Build of Keycloak rhbk-keycloak-rhel9, rhbk-keycloak-rhel9-operator
    affected: workaround, no fix available
  • Red Hat Fuse 7 micrometer-core
    affected: workaround, no fix available “Fix deferred”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack micrometer-core
    affected: workaround, no fix available
  • Red Hat AMQ Clients 2026.Q3
    fixed: vendor fix RHSA-2026:69459
  • Red Hat AMQ Broker 7.14.1
    fixed: vendor fix RHSA-2026:66488
  • Red Hat Build of Apache Camel 3.33.2.SP2 micrometer-core 1.16.6.redhat-00001
    fixed: vendor fix RHSA-2026:36839
show 8 more
  • Red Hat build of Keycloak 26.6 rhbk/keycloak-rhel9 26.6-11, rhbk/keycloak-rhel9-operator 26.6-11, rhbk/keycloak-operator-bundle 26.6.5-1
    fixed: vendor fix RHSA-2026:50849
  • Red Hat build of Keycloak 26.6.5
    fixed: vendor fix RHSA-2026:50848
  • Red Hat build of Quarkus 3.33.2.SP2 micrometer-core 1.16.6.redhat-00001
    fixed: vendor fix RHSA-2026:36013
  • Red Hat Data Grid 8.6.2
    fixed: vendor fix RHSA-2026:41951
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix RHSA-2026:70421
  • Red Hat OpenShift Dev Spaces 3.30 devspaces/openvsx-rhel9 1787759145, devspaces/pluginregistry-rhel9 1787759723
    fixed: vendor fix RHSA-2026:62260
  • Red Hat Streams for Apache Kafka 3.2.1
    fixed: vendor fix RHSA-2026:54435
  • Red Hat Build of Apache Camel 3.33.2.SP2 jimfs 1.1, jna 5.8.0, bcel 6.7.0, bson 5.6.4, gax 2.74.1, icu4j 78.2, +1630 more Red Hat build of Apache Camel for Spring Boot 4 micrometer-core Red Hat build of Debezium 3 micrometer-core Red Hat build of Quarkus 3.33.2.SP2 jna 5.8.0, bson 5.6.4, h2 2.4.240, y18n 5.0.8, cliui 8.0.1, guice 5.1.0, +1018 more Red Hat OpenShift AI (RHOAI) rhoai/odh-trustyai-service-rhel9 Red Hat OpenShift Dev Spaces devspaces/server-rhel9
    +3 more products
    Red Hat OpenShift Dev Spaces 3.30 devspaces/udi-rhel9 1787764814, devspaces/code-rhel9 1787762793, devspaces/server-rhel9 1787757597, devspaces/traefik-rhel9 1787756799, devspaces/udi-base-rhel9 1787761882, devspaces/code-sshd-rhel9 1787762385, +9 more Red Hat Satellite 6 candlepin, candlepin-selinux Red Hat streams for Apache Kafka 2 micrometer-core
    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
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% 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
CISA ADP 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
maven io.micrometer:micrometer-core
>=1.16.0, <1.16.6
>=1.15.0, <1.15.12
1.16.6
1.15.12

Affected products

  • Spring Micrometer
  • Red Hat Red Hat AMQ Broker 7.14.1
  • Red Hat Red Hat Build of Apache Camel 4.18 for Quarkus 3.33
  • Red Hat Red Hat build of Keycloak 26.6
  • Red Hat Red Hat build of Keycloak 26.6.5
  • Red Hat Red Hat Data Grid 8.6.2
  • Red Hat Streams for Apache Kafka 3.2.1
  • Red Hat Red Hat OpenShift Dev Spaces 3.30
  • Red Hat Red Hat AMQ Clients
  • Red Hat Red Hat build of Apache Camel 4 for Quarkus 3
  • Red Hat Red Hat build of Apache Camel for Spring Boot 4
  • Red Hat Red Hat build of Apache Camel - HawtIO 4
  • Red Hat Red Hat build of Apicurio Registry 3
  • Red Hat Red Hat build of Debezium 3
  • Red Hat Red Hat Build of Keycloak
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Dev Spaces
  • Red Hat Red Hat Satellite 6
  • Red Hat streams for Apache Kafka 2

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling
Technology feeds

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.