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CVE-2026-40992— Mail Auto-Configuration Does Not Enable SSL Hostname Verification

Quick assessment

Affected
Spring Spring Boot
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VMware Spring Boot是美国威睿（VMware）公司的一套开源框架。 VMware Spring Boot 4.0.0至4.0.6版本、3.5.0至3.5.14版本和3.4.0至3.4.16版本存在信任管理问题漏洞，该漏洞源于邮件自动配置未启用主机名验证。

CVSS 5.0 · Medium EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Spring Spring Boot 4.0.0< 4.0.6.1 affected
3.5.0< 3.5.14.1 affected
3.4.0< 3.4.17 affected
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I. Basic Information for CVE-2026-40992

Vulnerability Information
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Vulnerability Title
Mail Auto-Configuration Does Not Enable SSL Hostname Verification
Source: CVE Program / CVE List V5
Vulnerability Description
Spring Boot's Mail auto-configuration does not enable hostname verification. Applications that set the relevant JavaMail property, such as spring.mail.properties.mail.smtp.ssl.checkserveridentity=true, are not affected. Affected versions: Spring Boot 4.0.0 through 4.0.6; 3.5.0 through 3.5.14; 3.4.0 through 3.4.16.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
VMware Spring Boot 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware Spring Boot是美国威睿（VMware）公司的一套开源框架。 VMware Spring Boot 4.0.0至4.0.6版本、3.5.0至3.5.14版本和3.4.0至3.4.16版本存在信任管理问题漏洞，该漏洞源于邮件自动配置未启用主机名验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Spring Boot 4.0.0 ~ 4.0.6.1 -

II. Public POCs for CVE-2026-40992

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III. Intelligence Information for CVE-2026-40992

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Vendor Advisories for CVE-2026-40992 (1)

Same Patch Batch · Spring · 2026-06-11 · 15 CVEs total

CVE-2026-40999 8.6 HIGH Spring WS SSRF via unvalidated WS-Addressing reply destinations
CVE-2026-40994 8.2 HIGH Wss4jSecurityInterceptor disables WS-I BSP validation by default
CVE-2026-40998 8.2 HIGH Jaxp13 XPath XXE via StreamSource and SAXSource
CVE-2026-41699 8.1 HIGH Unsafe Deserialization in Spring GraphQL
CVE-2026-41700 8.1 HIGH Cross-Site WebSocket Hijacking in Spring for GraphQL
CVE-2026-41856 7.5 HIGH Spring GraphQL Annotation Detection Vulnerability
CVE-2026-40987 7.1 HIGH Remote-file synchronizer in Spring Integration writes server-supplied filename under local
CVE-2026-40985 6.4 MEDIUM Data Binding Vulnerability in Spring Web Flow with Unified EL Parser
CVE-2026-40995 5.4 MEDIUM X.509 authentication bypasses Spring Security account checks
CVE-2026-40997 5.3 MEDIUM SOAP security faults leak Spring Security account state
CVE-2026-41001 5.3 MEDIUM Predictable Temp Directory in Artemis Auto-configuration
CVE-2026-40986 4.8 MEDIUM Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML
CVE-2026-40996 4.8 MEDIUM Inbound WS-Security allows RSA PKCS#1 v1.5 key transport by default
CVE-2026-41000 3.7 LOW WSS4J validation does not use configured replay cache

IV. Related Vulnerabilities

Same product: Spring Boot
Same vendor: Spring
Same weakness: CWE-295