CVE-2026-40992Mail Auto-Configuration Does Not Enable SSL Hostname Verification
Updated under an hour ago ()
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It affects Spring Boot and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- vmware
- NVD analysis
- Analyzed
- Record last updated
- Jun 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Spring Spring Boot spring:boot (from the name) | from 4.0.0 before 4.0.6.1; from 3.5.0 before 3.5.14.1; from 3.4.0 before 3.4.17 | CNA record |
vmware spring_boot vmware:spring_boot | from 3.4.0 before 3.4.17; from 3.5.0 before 3.5.14.1; from 4.0.0 before 4.0.6.1 | NVD |
References
- https://spring.io/security/cve-2026-40992vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.