RHSA-2026:49701
Vulnerability from csaf_redhat - Published: 2026-08-03 15:40 - Updated: 2026-08-03 21:58Summary
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.7 security update
Severity
Important
Notes
Topic: A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Red Hat JBoss Enterprise Application Platform 8 is a platform for Java applications based on the WildFly application runtime.
This asynchronous patch is an update for Red Hat JBoss Enterprise Application Platform 8.1. See Release Notes for information about the most significant bug fixes and enhancements included in this release.
Security Fix(es):
* netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake (CVE-2026-45416)
* netty-resolver-dns: Netty: Information disclosure and data manipulation due to improper CNAME record validation (CVE-2026-45674)
* netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass (CVE-2026-50010)
* netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records (CVE-2026-47691)
* netty-handler: netty-handler: IPv6 subnet rule bypass due to incorrect masking operation (CVE-2026-44249)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in netty-handler, a component of the Netty network application framework. A remote attacker can exploit an incorrect masking operation in the IpSubnetFilterRule.compareTo() function to bypass configured IPv6 subnet rules. This allows valid public IP addresses to circumvent intended network restrictions, potentially leading to unauthorized access or exposure of services.
8.1 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat JBoss Enterprise Application Platform 8.1
Red Hat / Red Hat JBoss Enterprise Application Platform
|
cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS (Transport Layer Security) ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service (DoS) due to excessive memory consumption. The issue occurs in the `SslClientHelloHandler.decode()` method when processing the TLS handshake length.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat JBoss Enterprise Application Platform 8.1
Red Hat / Red Hat JBoss Enterprise Application Platform
|
cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Netty's DnsResolveContext. This vulnerability allows a remote attacker to achieve information disclosure or data manipulation by crafting malicious DNS responses. The flaw occurs because the DnsResolveContext fails to validate the origin (bailiwick) of CNAME records in DNS responses, which could enable an attacker to redirect network traffic or intercept sensitive data from affected applications.
8.7 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat JBoss Enterprise Application Platform 8.1
Red Hat / Red Hat JBoss Enterprise Application Platform
|
cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Netty's `DnsResolveContext`. An attacker controlling an authoritative name server for a subdomain can exploit this vulnerability by providing crafted NS records that are insufficiently validated. This allows the attacker to poison the DNS cache for parent domains, bypassing standard bailiwick rules. Consequently, future DNS resolutions for the affected parent domain will use the poisoned cache, potentially redirecting users to malicious servers and leading to information disclosure or integrity compromise.
8.7 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat JBoss Enterprise Application Platform 8.1
Red Hat / Red Hat JBoss Enterprise Application Platform
|
cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager (X509TrustManager), it fails to perform necessary hostname checks, enabling an attacker to impersonate a legitimate server. This could lead to sensitive information disclosure or man-in-the-middle attacks.
7.5 (High)
Affected products
Fixed
1 product
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Red Hat JBoss Enterprise Application Platform 8.1
Red Hat / Red Hat JBoss Enterprise Application Platform
|
cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
|
— |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
40 references
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"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-03T15:40:37+00:00",
"details": "Before applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:49701"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "netty-resolver-dns: Netty: Information disclosure and data manipulation due to improper CNAME record validation"
},
{
"cve": "CVE-2026-47691",
"cwe": {
"id": "CWE-346",
"name": "Origin Validation Error"
},
"discovery_date": "2026-06-12T16:02:45.855856+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2488439"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Netty\u0027s `DnsResolveContext`. An attacker controlling an authoritative name server for a subdomain can exploit this vulnerability by providing crafted NS records that are insufficiently validated. This allows the attacker to poison the DNS cache for parent domains, bypassing standard bailiwick rules. Consequently, future DNS resolutions for the affected parent domain will use the poisoned cache, potentially redirecting users to malicious servers and leading to information disclosure or integrity compromise.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "io.netty/netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This Important flaw in Netty\u0027s DNS resolution component, `netty-resolver-dns`, allows for DNS cache poisoning. An attacker with control over an authoritative name server for a subdomain could exploit this vulnerability to inject malicious DNS records into the cache of parent domains. This could lead to redirection of network traffic, impacting the integrity and availability of services relying on DNS resolution within affected Red Hat products.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-47691"
},
{
"category": "external",
"summary": "RHBZ#2488439",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488439"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-47691",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-47691"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47691",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47691"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85",
"url": "https://github.com/netty/netty/security/advisories/GHSA-5pvg-856g-cp85"
}
],
"release_date": "2026-06-12T14:33:16.595000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-03T15:40:37+00:00",
"details": "Before applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:49701"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "io.netty/netty-resolver-dns: Netty has Insufficient Bailiwick Validation for NS Records"
},
{
"cve": "CVE-2026-50010",
"cwe": {
"id": "CWE-347",
"name": "Improper Verification of Cryptographic Signature"
},
"discovery_date": "2026-06-12T16:02:13.735675+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2488429"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager (X509TrustManager), it fails to perform necessary hostname checks, enabling an attacker to impersonate a legitimate server. This could lead to sensitive information disclosure or man-in-the-middle attacks.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in Netty that affects Red Hat products utilizing the `netty-handler` component, including various Red Hat AMQ, Enterprise Application Platform, and OpenShift offerings. The vulnerability arises when a Netty client is configured with a plain X.509 Trust Manager, leading to a bypass of hostname verification. This oversight allows a remote attacker to perform man-in-the-middle attacks by impersonating a legitimate server, potentially compromising sensitive data.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-50010"
},
{
"category": "external",
"summary": "RHBZ#2488429",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488429"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-50010",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-50010"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-50010",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50010"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-c653-97m9-rcg9",
"url": "https://github.com/netty/netty/security/advisories/GHSA-c653-97m9-rcg9"
}
],
"release_date": "2026-06-12T14:50:43.151000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-03T15:40:37+00:00",
"details": "Before applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:49701"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"products": [
"Red Hat JBoss Enterprise Application Platform 8.1"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass"
}
]
}
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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.
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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.
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