Micrometer HTTP server instrumentations DoS vulnerability
Spring · Micrometer
7.5HighCVSS 3.1
Recommended action
Within 7 days
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available
Direct vendor intelligence
Authoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
1 current
CVE-2026-40984 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitymicrometer-core: micrometer-jetty11: micrometer-jetty12: Micrometer: Denial of Service via specially crafted HTTP requests
12 known affected
The vendor explicitly identifies these products as affected by this CVE.
micrometer-core as a component of Red Hat AMQ Clients
micrometer-core as a component of Red Hat build of Apache Camel - HawtIO 4
micrometer-core as a component of Red Hat build of Apache Camel 4 for Quarkus 3
micrometer-core as a component of Red Hat build of Apicurio Registry 3
micrometer-core as a component of Red Hat build of Debezium 3
micrometer-core as a component of Red Hat build of OptaPlanner 8
micrometer-core as a component of Red Hat build of Quarkus
micrometer-core as a component of Red Hat Fuse 7
micrometer-core as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack
devspaces/server-rhel9 as a component of Red Hat OpenShift Dev Spaces
micrometer-core as a component of Red Hat Process Automation 7
micrometer-core as a component of streams for Apache Kafka 2
Summary
A flaw was found in Micrometer. A remote attacker can provide specially crafted HTTP requests, which may lead to a denial-of-service (DoS) condition. This vulnerability allows an attacker to disrupt the availability of the affected system.
Remediation
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
Optional official sources
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.
Official European source
ENISA European Vulnerability Database
Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.
1 current
ENISA EUVD identifier
EUVD-2026-35320
No EUVD known-exploited evidence
In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Affected versions:
micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17.
micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available
01
What, why and how
In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Affected versions:
micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17.
micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
What
In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Affected versions:
micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17.
micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
Why
The product does not properly control the allocation and maintenance of a limited resource.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Affected versions:
micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17.
micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
Why
The product does not properly control the allocation and maintenance of a limited resource.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No confirmed evidence
No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.None recorded
No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
Likely attack path
a network path → Uncontrolled Resource Consumption → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.
CVSS vector ?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-400
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2026-35320Official EUVD mapping
In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition.
Affected versions:
micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17.
micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.
Official EUVD record ↗BSI · German · WID-SEC-2026-2923Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, und Jira): Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Atlassian Bitbucket, Atlassian Confluence, Atlassian Crucible, Atlassian Fisheye und Atlassian Jira ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, um einen SQL-Injection Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
Official advisory ↗Canadian Centre for Cyber Security · English · AV26-558Spring security advisory (AV26-558)
On June 8, 2026, Spring published security advisories to address vulnerabilities in the following products:
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20260610Security Bulletin 10 Jun 2026
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 10 Jun 2026, published on 10 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗CERT-FR · French · CERTFR-2026-AVI-1165Multiples vulnérabilités dans les produits IBM
Micrometer에서 발생하는 Uncontrolled Resource Consumption 취약점(CVE-2026-40984) [2][24]
Official advisory ↗NCSC-NL · Dutch · NCSC-2026-0325Kwetsbaarheden verholpen in Atlassian producten
Micrometer versions 1.9.0 through 1.16.5, including micrometer-core and micrometer-jetty, are vulnerable to specially crafted HTTP requests that can cause a denial-of-service (DoS) condition, impacting system availability.
Operational remediation based on structured source evidence.
Status ?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 9 Jun 2026 · Last source change 13 Aug 2026, 12:04 UTC · CWE-400 · Uncontrolled Resource Consumption
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source ?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-35320
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment
Core structured fields are present and their contributing authorities are shown above.
Affected versionsThe structured affected or fixed version information changed.
Before
micrometer-core as a component of Red Hat AMQ Broker 7; micrometer-core as a component of Red Hat AMQ Clients; micrometer-core as a component of Red Hat build of Apache Camel - HawtIO 4; micrometer-core as a component of Red Hat build of Apache Camel 4 for Quarkus 3; micrometer-core as a component of Red Hat build of Apicurio Registry 3; micrometer-core as a component of Red Hat build of Debezium 3; micrometer-core as a component of Red Hat build of OptaPlanner 8; micrometer-core as a component of Red Hat build of Quarkus; micrometer-core as a component of Red Hat Fuse 7; micrometer-core as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack; devspaces/server-rhel9 as a component of Red Hat OpenShift Dev Spaces; micrometer-core as a component of Red Hat Process Automation 7; micrometer-core as a component of streams for Apache Kafka 2 · Fixed: rhbk/keycloak-operator-bundle@sha256:06ee2f18c4218c9a095360efa2023b2080aa81e04a08363dbcb1d14de85a5d0d_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:0024d9a0b69b61004a0d35ee25eefc443fe75ce2563b1645ec318caacc0aa23c_s390x as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:2eeef9cec3ee8e3cfdb1c4b7377582b4a5378f852e11872eeb74597ad9ec0615_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:37c7d8c5b4bd9649b3da2c0929075c6bd311361667a7eb25eb3f52927b7eca8e_ppc64le as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:aadf59a1eeb8e64f2f1eea906dd1837fd144d8406b07630a3e2b0c9265c107e7_arm64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:30a9118cf874444aabdf4dd8f84d44cb503f89d8432a652fbb0ba860d3815c4d_ppc64le as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:7b668bfd2a9a1bd6343fb2e802912eaa72bd7043fa5be6e0a6edc06894c74b63_arm64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:83e1c37e7e5b268c8b516f9c13d064db4fbdcd68d25a542dec0d237665b06705_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:c8203365ded9864afe84f579798eefd5f4a79ee6a4e585e47fcb0d8ea3ce959f_s390x as a component of Red Hat build of Keycloak 26.6; Red Hat Build of Apache Camel 4.18 for Quarkus 3.33; Red Hat Data Grid 8.6.2; registry.redhat.io/devspaces/openvsx-rhel9@sha256:560dd6062c5240e73ec60ecc13d402009b01e81ed452b6314c3817a2d116d575_amd64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:61a523a9663ff94b984f06fb72a570a18faf326b5efe6ef7d3ba55f96d4e422f_ppc64le as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:a4f8b673fd049befb193ee8f93ac8167b784cfe35b5de3584b19a95c726d9cff_s390x as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:b73b5fef7a238e3a16a0b724a8022588a4f69195743bf489f2bb01e4d3a59113_arm64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:121aee11bc25d5e983808691d3b82905048b5a67ffb01f61c86815867e4e8d08_amd64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:7ba97ebd86b3442cd95ffa2605b7890e2f85731ae84ee696d18bae0633439afe_s390x as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:9eccdaac68f3ce6a42a435ceb511483d0f233fb21b3dee8343b8d70cbd67f2ac_arm64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:f74ce43b7d8ade25e5b0f78a41f87db5c6005a85f48cde956b9a87a5892c3a87_ppc64le as a component of Red Hat OpenShift Dev Spaces 3.30; Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16; Red Hat build of Keycloak 26.6.5; Streams for Apache Kafka 3.2.1
After
micrometer-core as a component of Red Hat AMQ Clients; micrometer-core as a component of Red Hat build of Apache Camel - HawtIO 4; micrometer-core as a component of Red Hat build of Apache Camel 4 for Quarkus 3; micrometer-core as a component of Red Hat build of Apicurio Registry 3; micrometer-core as a component of Red Hat build of Debezium 3; micrometer-core as a component of Red Hat build of OptaPlanner 8; micrometer-core as a component of Red Hat build of Quarkus; micrometer-core as a component of Red Hat Fuse 7; micrometer-core as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack; devspaces/server-rhel9 as a component of Red Hat OpenShift Dev Spaces; micrometer-core as a component of Red Hat Process Automation 7; micrometer-core as a component of streams for Apache Kafka 2 · Fixed: rhbk/keycloak-operator-bundle@sha256:06ee2f18c4218c9a095360efa2023b2080aa81e04a08363dbcb1d14de85a5d0d_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:0024d9a0b69b61004a0d35ee25eefc443fe75ce2563b1645ec318caacc0aa23c_s390x as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:2eeef9cec3ee8e3cfdb1c4b7377582b4a5378f852e11872eeb74597ad9ec0615_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:37c7d8c5b4bd9649b3da2c0929075c6bd311361667a7eb25eb3f52927b7eca8e_ppc64le as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9-operator@sha256:aadf59a1eeb8e64f2f1eea906dd1837fd144d8406b07630a3e2b0c9265c107e7_arm64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:30a9118cf874444aabdf4dd8f84d44cb503f89d8432a652fbb0ba860d3815c4d_ppc64le as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:7b668bfd2a9a1bd6343fb2e802912eaa72bd7043fa5be6e0a6edc06894c74b63_arm64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:83e1c37e7e5b268c8b516f9c13d064db4fbdcd68d25a542dec0d237665b06705_amd64 as a component of Red Hat build of Keycloak 26.6; rhbk/keycloak-rhel9@sha256:c8203365ded9864afe84f579798eefd5f4a79ee6a4e585e47fcb0d8ea3ce959f_s390x as a component of Red Hat build of Keycloak 26.6; Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat Build of Apache Camel 4.18 for Quarkus 3.33; Red Hat Data Grid 8.6.2; registry.redhat.io/devspaces/openvsx-rhel9@sha256:560dd6062c5240e73ec60ecc13d402009b01e81ed452b6314c3817a2d116d575_amd64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:61a523a9663ff94b984f06fb72a570a18faf326b5efe6ef7d3ba55f96d4e422f_ppc64le as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:a4f8b673fd049befb193ee8f93ac8167b784cfe35b5de3584b19a95c726d9cff_s390x as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/openvsx-rhel9@sha256:b73b5fef7a238e3a16a0b724a8022588a4f69195743bf489f2bb01e4d3a59113_arm64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:121aee11bc25d5e983808691d3b82905048b5a67ffb01f61c86815867e4e8d08_amd64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:7ba97ebd86b3442cd95ffa2605b7890e2f85731ae84ee696d18bae0633439afe_s390x as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:9eccdaac68f3ce6a42a435ceb511483d0f233fb21b3dee8343b8d70cbd67f2ac_arm64 as a component of Red Hat OpenShift Dev Spaces 3.30; registry.redhat.io/devspaces/pluginregistry-rhel9@sha256:f74ce43b7d8ade25e5b0f78a41f87db5c6005a85f48cde956b9a87a5892c3a87_ppc64le as a component of Red Hat OpenShift Dev Spaces 3.30; Red Hat build of Apache Camel 4.18.1.P1 for Spring Boot 3.5.16; Red Hat build of Keycloak 26.6.5; Streams for Apache Kafka 3.2.1
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
CVE-2026-40984: Micrometer HTTP server instrumentations DoS vulnerability | BlackTree
