CVE-2026-40542 (GCVE-0-2026-40542)
Vulnerability from cvelistv5 – Published: 2026-04-22 07:07 – Updated: 2026-09-09 12:05
VLAI
EPSS
VEX
Title
Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to accept authentication without proper mutual authentication verification
Summary
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 14:14 UTC
Assigner
References
16 references
Impacted products
48 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache HttpClient |
Affected:
5.6 , < 5.6.1
(semver)
|
guessed | |
| Red Hat | OpenShift Developer Tools and Services 4.12 |
Unaffected:
1786628667 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.12::el8 |
||
| Red Hat | OpenShift Developer Tools and Services 4.13 |
Unaffected:
1786628681 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.13::el8 |
||
| Red Hat | OpenShift Developer Tools and Services 4.14 |
Unaffected:
1786533561 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.14::el8 |
||
| Red Hat | OpenShift Developer Tools and Services 4.15 |
Unaffected:
1786533565 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.15::el8 |
||
| Red Hat | OpenShift Developer Tools and Services 4.16 |
Unaffected:
1787125166 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.16::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.17 |
Unaffected:
1787124635 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.17::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.18 |
Unaffected:
1787125069 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.18::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.19 |
Unaffected:
1787124632 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.19::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.20 |
Unaffected:
1787124925 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.20::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.21 |
Unaffected:
1787125311 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.21::el9 |
||
| Red Hat | OpenShift Developer Tools and Services 4.22 |
Unaffected:
1787124779 , < *
(rpm)
cpe:/a:redhat:ocp_tools:4.22::el9 |
||
| Red Hat | Cryostat 4 |
cpe:/a:redhat:cryostat:4
|
||
| Red Hat | Migration Toolkit for Applications 8 |
cpe:/a:redhat:migration_toolkit_applications:8
|
||
| Red Hat | OpenShift Developer Tools and Services |
cpe:/a:redhat:ocp_tools
|
||
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1
|
||
| Red Hat | Red Hat AMQ Broker 7 |
cpe:/a:redhat:amq_broker:7
|
||
| Red Hat | Red Hat AMQ Clients |
cpe:/a:redhat:amq_clients:2023
|
||
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 |
cpe:/a:redhat:camel_quarkus:3
|
||
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
||
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 |
cpe:/a:redhat:apache_camel_hawtio:4
|
||
| Red Hat | Red Hat build of Apicurio Registry 2 |
cpe:/a:redhat:service_registry:2
|
||
| Red Hat | Red Hat build of Apicurio Registry 3 |
cpe:/a:redhat:apicurio_registry:3
|
||
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3
|
||
| Red Hat | Red Hat build of OptaPlanner 8 |
cpe:/a:redhat:optaplanner:::el6
|
||
| Red Hat | Red Hat build of Quarkus |
cpe:/a:redhat:quarkus:3
|
||
| Red Hat | Red Hat Certificate System 10 |
cpe:/a:redhat:certificate_system:10
|
||
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8
|
||
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
||
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
||
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
||
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
||
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
||
| Red Hat | Red Hat JBoss Core Services |
cpe:/a:redhat:jboss_core_services:1
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8
|
||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp
|
||
| Red Hat | Red Hat JBoss Web Server 5 |
cpe:/a:redhat:jboss_enterprise_web_server:5
|
||
| Red Hat | Red Hat JBoss Web Server 6 |
cpe:/a:redhat:jboss_enterprise_web_server:6
|
||
| Red Hat | Red Hat Lightspeed for Runtimes Operator |
cpe:/a:redhat:lightspeed_for_runtimes:1
|
||
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1
|
||
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
||
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3
|
||
| Red Hat | Red Hat Process Automation 7 |
cpe:/a:redhat:jboss_enterprise_bpms_platform:7
|
||
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
|
||
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
||
| Red Hat | streams for Apache Kafka 2 |
cpe:/a:redhat:amq_streams:2
|
||
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3
|
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"product": "Red Hat Enterprise Linux 7",
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"cpes": [
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"vendor": "Red Hat"
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Solutions
ADP · redhat-SADP
RHSA-2026:60247: OpenShift Developer Tools and Services 4.12
RHSA-2026:60249: OpenShift Developer Tools and Services 4.13
RHSA-2026:60248: OpenShift Developer Tools and Services 4.14
RHSA-2026:60239: OpenShift Developer Tools and Services 4.15
RHSA-2026:60251: OpenShift Developer Tools and Services 4.16
RHSA-2026:60246: OpenShift Developer Tools and Services 4.17
RHSA-2026:60250: OpenShift Developer Tools and Services 4.18
RHSA-2026:60252: OpenShift Developer Tools and Services 4.19
RHSA-2026:60259: OpenShift Developer Tools and Services 4.20
RHSA-2026:60254: OpenShift Developer Tools and Services 4.21
RHSA-2026:60256: OpenShift Developer Tools and Services 4.22
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.