Common Weakness Enumeration
CWE-297
AllowedImproper Validation of Certificate with Host Mismatch
Abstraction: Variant · Status: Incomplete
The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.
156 vulnerabilities reference this CWE, most recent first.
CVE-2026-26214 (GCVE-0-2026-26214)
Vulnerability from cvelistv5 – Published: 2026-02-12 15:01 – Updated: 2026-07-14 15:53 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Xiaomi Galaxy FDS Android SDK <= 3.0.8 TLS Hostname Verification Disabled Enables MITM
Summary
Galaxy FDS Android SDK (XiaoMi/galaxy-fds-sdk-android) version 3.0.8 and prior disable TLS hostname verification when HTTPS is enabled (the default configuration). In GalaxyFDSClientImpl.createHttpClient(), the SDK configures Apache HttpClient with SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER, which accepts any valid TLS certificate regardless of hostname mismatch. Because HTTPS is enabled by default in FDSClientConfiguration, all applications using the SDK with default settings are affected. This vulnerability allows a man-in-the-middle attacker to intercept and modify SDK communications to Xiaomi FDS cloud storage endpoints, potentially exposing authentication credentials, file contents, and API responses. The XiaoMi/galaxy-fds-sdk-android open source project has reached end-of-life status.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-03 21:02 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/XavLimSG/Vulnerability-Researc… | technical-descriptionexploit |
| https://github.com/XiaoMi/galaxy-fds-sdk-android | product |
| https://www.vulncheck.com/advisories/xiaomi-galax… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Xiaomi Technology Co., Ltd. | Galaxy FDS Android SDK |
Affected:
0 , ≤ 3.0.8
(semver)
|
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CVE-2026-19553 (GCVE-0-2026-19553)
Vulnerability from cvelistv5 – Published: 2026-09-30 16:17 – Updated: 2026-10-16 18:33
VLAI
EPSS
VEX
Title
SSLContext.wrap_bio() missing validation of server_hostname parameter
Summary
ssl.SSLContext.wrap_bio() didn't require the server_hostname argument
to not be None if ssl.SSLContext.check_hostname was set. Due to a
missing parameter check in SSLObject, if the server_hostname argument
isn't supplied then hostname verification would be silently skipped.
This defect could lead to programs where certificate hostname verification
*appeared* to be succeeding with SSLContext.check_hostname = True and no
ValueError being raised due to misconfiguration.
If the program passes a server_hostname value that isn't an empty string
or None to any of these APIs then certificate hostname verification
proceeds as expected and the program is not affected by this vulnerability.
Mitigating this vulnerability doesn't require updating Python or applying
the patch. To mitigate, pass a valid non-None and non-empty
server_hostname value to SSLContext.wrap_bio(),
asyncio.create_connection(), or asyncio.loop.start_tls() and
certificate hostname verification will proceed as expected. Upgrading to
the latest version of Python or applying the patch only changes the
behavior from silently skipping hostname verification to raising a
ValueError, similar to SSLContext.wrap_socket(), when server_hostname
isn't supplied.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:33 UTC
CWE
Assigner
References
11 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Python Software Foundation | CPython |
Affected:
0 , < 3.10.22
(python)
Affected: 3.11.0 , < 3.11.17 (python) Affected: 3.12.0 , < 3.12.15 (python) Affected: 3.13.0 , < 3.13.16 (python) Affected: 3.14.0 , < 3.14.8 (python) Affected: 3.15.0a1 , < 3.15.0rc3 (python) |
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CVE-2026-15925 (GCVE-0-2026-15925)
Vulnerability from cvelistv5 – Published: 2026-07-16 05:31 – Updated: 2026-07-16 12:43
VLAI
EPSS
VEX
Title
Improper TLS Hostname Verification in Snowflake Connector for Python
Summary
Improper TLS hostname verification in Snowflake Connector for Python versions prior to 4.7.1 and 3.18.1 may have allowed a network-positioned attacker to bypass certificate hostname validation on HTTPS connections made by the connector. An attacker with on-path network access could exploit this by intercepting or redirecting network traffic and presenting a certificate signed by any trusted CA for any domain, causing the connector to accept connections without validating that the certificate matched the requested hostname. Successful exploitation requires an on-path traffic interception capability (e.g. ARP/DNS poisoning, rogue access point, BGP hijacking, or malicious proxy/exit node). This vulnerability may have exposed credentials, query data, and staged file contents to interception and tampering, and may have enabled the attacker to issue arbitrary SQL within the context of the victim's connector session. Impact is limited by the privileges of the affected Snowflake role. The fix is available in Snowflake Connector for Python versions 4.7.1 and 3.18.1. Users must manually upgrade.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 12:43 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Snowflake | Snowflake Connector for Python |
Affected:
3.17.4 , < 3.18.1
(semver)
Affected: 4.0.0 , < 4.7.1 (semver) |
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CVE-2026-15243 (GCVE-0-2026-15243)
Vulnerability from cvelistv5 – Published: 2026-07-24 11:29 – Updated: 2026-07-24 12:33 X_Open Source
VLAI
EPSS
VEX
Title
Improper Validation of Certificate in CAS Client
Summary
Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position (DNS poisoning, rogue Wi-Fi, malicious proxy, etc.) can provide any CA-signed certificate for a hostname that matches the configured allowlist or regex. This can lead to intercepting the CAS exchange, capturing the Ticket-Granting Ticket (TGT), and subsequently obtaining Service Tickets on behalf of the victim.
Because maintainers contact attempts were unsuccessful, vulnerabilities have only been confirmed in version 4.1.0 (Java Apereo CAS Client) and 3.6.4 (Jasig CAS Client) but may also affect other versions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-24 12:33 UTC
CWE
- CWE-297 - Improper validation of certificate with host mismatch
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2026/07/CVE-2026-15243 | third-party-advisory |
| https://www.apereo.org/programs/software/cas | product |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apereo | Java Apereo CAS Client |
Affected:
4.1.0
(semver)
|
|
| Apereo | Jasig CAS Client |
Affected:
3.6.4
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CVE-2026-12730 (GCVE-0-2026-12730)
Vulnerability from cvelistv5 – Published: 2026-08-05 15:57 – Updated: 2026-08-05 17:59
VLAI
EPSS
VEX
Title
Improper Validation of Certificate with Host Mismatch in IBM Business Automation Workflow containers
Summary
IBM Business Automation Workflow containers and traditional 26.0.0, 25.0.0 through 25.0.0 Interim Fix 005, 24.0.1 through 24.0.1 Interim Fix 007, and 24.0.0 through 24.0.0 Interim Fix 009 IBM Business Automation Workflow fails to properly verify that the hostname matches the server certificate potentially allowing connections to an attacker-controlled server.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 17:59 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7282596 | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Business Automation Workflow containers and traditional |
Affected:
26.0.0
Affected: 25.0.0 , ≤ 25.0.0 Interim Fix 005 (semver) Affected: 24.0.1 , ≤ 24.0.1 Interim Fix 007 (semver) Affected: 24.0.0 , ≤ 24.0.0 Interim Fix 009 (semver) cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:26.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:25.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:25.0.0:interim_fix_005:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:24.0.1:*:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:24.0.1:interim_fix_007:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:24.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:business_automation_workflow_containers_and_traditional:24.0.0:interim_fix_009:*:*:*:*:*:* |
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"value": "IBM strongly recommends addressing the vulnerability now by upgrading.\n\nAffected Product(s)Version(s)Remediation / FixIBM Business Automation Workflow containersV26.0.0Apply container 26.0.0-IF001 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-containers-26000-interim-fixes IBM Business Automation Workflow traditionalV26.0.0Apply traditional 26.0.0-IF001 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-26000-interim-fixes IBM Business Automation Workflow containersV25.0.0 - V25.0.0-IF005Apply container 25.0.0-IF006 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-containers-25000-interim-fixes IBM Business Automation Workflow traditionalV25.0.0 - V25.0.0-IF005Apply traditional 25.0.0-IF006 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-25000-interim-fixes IBM Business Automation Workflow containersV24.0.1 - V24.0.1-IF007Apply container 24.0.1-IF008 https://www.ibm.com/support/pages/node/7183042 IBM Business Automation Workflow traditionalV24.0.1 - V24.0.1-IF007Apply traditional 24.0.1-IF008 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-24010-interim-fixes IBM Business Automation Workflow containersV24.0.0 - V24.0.0-IF009Apply container 24.0.0-IF010 https://www.ibm.com/support/pages/node/7159792 IBM Business Automation Workflow traditionalV24.0.0 - V24.0.0-IF009Apply traditional 24.0.0-IF010 https://www.ibm.com/support/pages/readme-ibm-business-automation-workflow-24000-interim-fixes"
}
],
"title": "Improper Validation of Certificate with Host Mismatch in IBM Business Automation Workflow containers"
}
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CVE-2026-12064 (GCVE-0-2026-12064)
Vulnerability from cvelistv5 – Published: 2026-07-03 06:13 – Updated: 2026-09-15 06:02
VLAI
EPSS
VEX
Title
proto-default skips SSH verification
Summary
When a user invokes curl using a schemeless URL combined with
`--proto-default` sftp (or scp), a disconnect occurs between the tool layer
and libcurl. The tool layer incorrectly infers the URL scheme, which
erroneously bypasses the initialization of critical SSH security options like
CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 and CURLOPT_SSH_KNOWNHOSTS. Conversely, the
libcurl runtime successfully honors CURLOPT_DEFAULT_PROTOCOL and establishes
the connection via SFTP/SCP as specified. Because the tool layer skipped the
security configuration, these SSH host verification options are silently
omitted, causing curl to connect to an unverified SSH remote host without
throwing an error.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 18:19 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.81.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver) |
|
| curl | curl |
Affected:
18270893abdb19f0ca170c118f8a2847dbd304be , < ab3bb8cd8be8f9d4acb97da0418abc279182041e
(git)
|
|
| curl | curl |
Affected:
8.20.0
Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 |
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CVE-2026-9744 (GCVE-0-2026-9744)
Vulnerability from cvelistv5 – Published: 2026-09-03 20:43 – Updated: 2026-09-04 17:43
VLAI
EPSS
VEX
Title
Vulnerabilities exists in IBM Netezza Software
Summary
IBM Netezza Software 11.3.0.3 through Interim Fix 002 does not validate or improperly validates TLS certificate validation, which could allow an attacker to obtain sensitive information using man in the middle techniques.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 17:42 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7284359 | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | Netezza Software |
Affected:
11.3.0.3 , ≤ Interim Fix 002
(semver)
cpe:2.3:a:ibm:netezza_software:11.3.0.3:*:*:*:*:*:*:* cpe:2.3:a:ibm:netezza_software:interim:interim_fix_002:*:*:*:*:*:* |
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CVE-2026-9547 (GCVE-0-2026-9547)
Vulnerability from cvelistv5 – Published: 2026-07-03 06:18 – Updated: 2026-09-15 06:03
VLAI
EPSS
VEX
Title
SSH improper host validation
Summary
When a libcurl-based application performs transfers via `SCP://` or `SFTP://`
and utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an
untrusted server. This vulnerability occurs when a server presents a host key
type that does not match the specific key type already recorded for that host
in the `known_hosts` file. Instead of rejecting the mismatch, the callback
mechanism fails to properly enforce the restriction, allowing the connection
to succeed without warning and risking a potential man-in-the-middle attack.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 16:47 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| curl | curl |
Affected:
7.69.0 , < 8.14.2
(semver)
Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver) |
|
| curl | curl |
Affected:
507cf6a13db0375eadd4655b4c64710db29e9cf2 , < 0b8dbbc63c98777e4584cb9fbd71df3464008ad1
(git)
|
|
| curl | curl |
Affected:
8.20.0
Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0 Affected: 7.70.0 Affected: 7.69.1 Affected: 7.69.0 |
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CVE-2025-68637 (GCVE-0-2025-68637)
Vulnerability from cvelistv5 – Published: 2026-01-07 09:39 – Updated: 2026-01-07 14:40
VLAI
EPSS
VEX
Title
Apache Uniffle: Insecure SSL Configuration in Uniffle HTTP Client
Summary
The Uniffle HTTP client is configured to trust all SSL certificates and
disables hostname verification by default. This insecure configuration
exposes all REST API communication between the Uniffle CLI/client and the
Uniffle Coordinator service to potential Man-in-the-Middle (MITM) attacks.
This issue affects all versions from before 0.10.0.
Users are recommended to upgrade to version 0.10.0, which fixes the issue.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 14:40 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Uniffle |
Affected:
0 , < 0.10.0
(semver)
|
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CVE-2025-68161 (GCVE-0-2025-68161)
Vulnerability from cvelistv5 – Published: 2025-12-18 20:47 – Updated: 2026-04-10 16:18
VLAI
EPSS
VEX
Title
Apache Log4j Core: Missing TLS hostname verification in Socket appender
Summary
The Socket Appender in Apache Log4j Core versions 2.0-beta9 through 2.25.2 does not perform TLS hostname verification of the peer certificate, even when the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName configuration attribute or the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property is set to true.
This issue may allow a man-in-the-middle attacker to intercept or redirect log traffic under the following conditions:
* The attacker is able to intercept or redirect network traffic between the client and the log receiver.
* The attacker can present a server certificate issued by a certification authority trusted by the Socket Appender’s configured trust store (or by the default Java trust store if no custom trust store is configured).
Users are advised to upgrade to Apache Log4j Core version 2.25.3, which addresses this issue.
As an alternative mitigation, the Socket Appender may be configured to use a private or restricted trust root to limit the set of trusted certificates.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-18 21:34 UTC
CWE
- CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
8 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Log4j Core |
Affected:
2.0-beta9 , < 2.25.3
(maven)
Affected: 3.0.0-alpha1 , ≤ 3.0.0-beta3 (maven) cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* |
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],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"cpes": [
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"defaultStatus": "unaffected",
"packageName": "org.apache.logging.log4j:log4j-core",
"packageURL": "pkg:maven/org.apache.logging.log4j/log4j-core",
"product": "Apache Log4j Core",
"vendor": "Apache Software Foundation",
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"status": "affected",
"version": "2.0-beta9",
"versionType": "maven"
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"status": "affected",
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"credits": [
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"lang": "en",
"type": "finder",
"value": "Samuli Leinonen"
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"value": "\u003cp\u003eThe Socket Appender in Apache Log4j Core versions \u003ccode\u003e2.0-beta9\u003c/code\u003e through \u003ccode\u003e2.25.2\u003c/code\u003e does not perform TLS hostname verification of the peer certificate, even when the \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName\"\u003everifyHostName\u003c/a\u003e configuration attribute or the \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName\"\u003elog4j2.sslVerifyHostName\u003c/a\u003e system property is set to \u003ccode\u003etrue\u003c/code\u003e.\u003c/p\u003e\u003cp\u003eThis issue may allow a man-in-the-middle attacker to intercept or redirect log traffic under the following conditions:\u003c/p\u003e\u003cul\u003e\u003cli\u003eThe attacker is able to intercept or redirect network traffic between the client and the log receiver.\u003c/li\u003e\u003cli\u003eThe attacker can present a server certificate issued by a certification authority trusted by the Socket Appender\u2019s configured \u003cstrong\u003etrust store\u003c/strong\u003e (or by the default Java trust store if no custom trust store is configured).\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eUsers are advised to upgrade to Apache Log4j Core version \u003ccode\u003e2.25.3\u003c/code\u003e, which addresses this issue.\u003c/p\u003e\u003cp\u003eAs an alternative mitigation, the Socket Appender may be configured to use a private or restricted trust root to limit the set of trusted certificates.\u003c/p\u003e"
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"value": "The Socket Appender in Apache Log4j Core versions 2.0-beta9 through 2.25.2 does not perform TLS hostname verification of the peer certificate, even when the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName configuration attribute or the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property is set to true.\n\nThis issue may allow a man-in-the-middle attacker to intercept or redirect log traffic under the following conditions:\n\n * The attacker is able to intercept or redirect network traffic between the client and the log receiver.\n * The attacker can present a server certificate issued by a certification authority trusted by the Socket Appender\u2019s configured trust store (or by the default Java trust store if no custom trust store is configured).\n\n\nUsers are advised to upgrade to Apache Log4j Core version 2.25.3, which addresses this issue.\n\nAs an alternative mitigation, the Socket Appender may be configured to use a private or restricted trust root to limit the set of trusted certificates."
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
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"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:N",
"version": "4.0",
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-297",
"description": "CWE-297 Improper Validation of Certificate with Host Mismatch",
"lang": "en",
"type": "CWE"
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]
}
],
"providerMetadata": {
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"url": "https://logging.apache.org/cyclonedx/vdr.xml"
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"url": "https://lists.apache.org/thread/xr33kyxq3sl67lwb61ggvm1fzc8k7dvx"
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"source": {
"discovery": "EXTERNAL"
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"title": "Apache Log4j Core: Missing TLS hostname verification in Socket appender",
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"cveMetadata": {
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"datePublished": "2025-12-18T20:47:49.123Z",
"dateReserved": "2025-12-16T11:30:53.875Z",
"dateUpdated": "2026-04-10T16:18:50.424Z",
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Mitigation
Architecture and Design
Fully check the hostname of the certificate and provide the user with adequate information about the nature of the problem and how to proceed.
Mitigation
Implementation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
No CAPEC attack patterns related to this CWE.