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Fencer Vulns
high 7.5

CVE-2026-54399 json

Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration

published 2026-07-01 4 mo ago modified 2026-10-25 15 d ago also EUVD-2026-41094 , GHSA-hf6x-8p5f-cgmf

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length

Patch / fix

  • maven org.apache.httpcomponents.core5:httpcore5 5.4.3, 5.5-beta2
  • httpcomponents-core5 Debian 14 5.4.3-1

debian advisories DEBIAN-CVE-2026-54399

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-2026-54399 updated cvss 7.5

org.apache.httpcomponents.core5/httpcore5: Apache HttpComponents Core: Denial of Service via excessive HTTP headers

  • Red Hat Cryostat 4 httpcore Red Hat OpenShift Developer Tools and Services jenkins, jenkins-2-plugins
    affected: workaround, no fix available
  • Red Hat AI Inference Server rhaii/vllm-gaudi-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat AMQ Clients httpcore Red Hat build of Apache Camel - HawtIO 4 httpcore Red Hat build of Apache Camel 4 for Quarkus 3 httpcore5 5.3.6 Red Hat build of Apicurio Registry 3 httpcore5 5.3.6
    affected: workaround, no fix available
  • Red Hat build of Debezium 3 httpcore5 5.3.6 Red Hat Build of Keycloak httpcore, rhbk-rhel9-operator, rhbk/keycloak-rhel9, rhbk-openshift-rhel9, rhbk/keycloak-rhel9-operator Red Hat Data Grid 8 httpcore Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-gaudi-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Application Platform 7 httpcore, eap74-els-openjdk8-openshift-rhel8, eap74-els-openjdk11-openshift-rhel8, eap74-els-openjdk17-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-vllm-gaudi-rhel9, rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9, rhoai/odh-workbench-jupyter-pytorch-cuda-py312-rhel9, rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9, rhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9, +6 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Single Sign-On 7 httpcore
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.2.0-14, cryostat/cryostat-agent-init-rhel9 0.7.0-12
    fixed: vendor fix RHSA-2026:68333
show 17 more
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-rhel8 1786628667
    fixed: vendor fix RHSA-2026:60247
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-rhel8 1786628681
    fixed: vendor fix RHSA-2026:60249
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-rhel8 1786533561
    fixed: vendor fix RHSA-2026:60248
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-rhel8 1786533565
    fixed: vendor fix RHSA-2026:60239
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-rhel9 1787125166
    fixed: vendor fix RHSA-2026:60251
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-rhel9 1787124635
    fixed: vendor fix RHSA-2026:60246
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-rhel9 1787125069
    fixed: vendor fix RHSA-2026:60250
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-rhel9 1787124632
    fixed: vendor fix RHSA-2026:60252
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-rhel9 1787124925
    fixed: vendor fix RHSA-2026:60259
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-rhel9 1787125311
    fixed: vendor fix RHSA-2026:60254
  • Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-rhel9 1787124779
    fixed: vendor fix RHSA-2026:60256
  • Red Hat AI Inference Server 3.2 rhaiis/vllm-cuda-rhel9 1787860580
    fixed: vendor fix RHSA-2026:61627
  • Red Hat Build of Apache Camel 3.33.2.SP3 httpcore5 5.3.6.redhat-00002
    fixed: vendor fix RHSA-2026:48118
  • Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16
    fixed: vendor fix RHSA-2026:54622
  • Red Hat OpenShift AI 2.25 rhoai/odh-modelmesh-rhel9 1790881700
    fixed: vendor fix RHSA-2026:87410
  • Red Hat OpenShift Dev Spaces 3.30 devspaces/openvsx-rhel9 1787759145, devspaces/pluginregistry-rhel9 1787759723
    fixed: vendor fix RHSA-2026:62260
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-db-rhel9 4.2.0-22, cryostat/jfr-datasource-rhel9 4.2.0-14, cryostat/cryostat-reports-rhel9 4.2.0-14, cryostat/cryostat-storage-rhel9 4.2.0-22, cryostat/cryostat-rhel9-operator 4.2.0-21, cryostat/cryostat-operator-bundle 4.2.0-12, +2 more Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-agent-base-rhel8 1786628706 Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-agent-base-rhel8 1786628711 Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-agent-base-rhel8 1786628748 Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-agent-base-rhel8 1786628726 Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-agent-base-rhel9 1787124634
    +3 more products
    Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-agent-base-rhel9 1787124986 Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-agent-base-rhel9 1787124633 Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-agent-base-rhel9 1787124663
    not affected: vulnerable code not present

18 more not affected in the full advisory

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
4 mo ago

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
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
CNA 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 org.apache.httpcomponents.core5:httpcore5
<5.4.3
>=5.5-alpha1, <5.5-beta2
5.4.3
5.5-beta2

Affected products

  • Apache Software Foundation Apache HttpComponents Core

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.