CVE-2026-100701

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Source
https://cve.org/CVERecord?id=CVE-2026-100701
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100701.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100701
Aliases
  • GHSA-6vj9-mwq6-2f5v
Downstream
Published
2026-09-26T13:23:57Z
Modified
2026-09-28T03:48:31Z
Severity
  • 6.0 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Nodemailer 5.0.0 through 10.0.1 TLS servername Cache Confusion
Details

Nodemailer versions 5.0.0 through 10.0.1 use a process-global DNS cache that is keyed only by the DNS host, while each cache entry also stores the caller-specific TLS servername. When two direct TLS/SMTPS transports (secure: true) resolve the same non-IP host with different tls.servername values, the first transport's servername is returned on the cache hit and overwrites the second transport's explicitly configured value, so Nodemailer sends the wrong SNI value and validates the peer certificate against the wrong identity. In multi-tenant services or SNI-routed SMTP gateways, an attacker who can prime the cache can cause a victim transport to connect to the attacker's TLS virtual host and accept the attacker's certificate even with rejectUnauthorized: true, disclosing the victim's SMTP credentials. Fixed in 10.0.2.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-295"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100701.json"
}
References

Affected packages

Git / github.com/nodemailer/nodemailer

Affected ranges

Type
GIT
Repo
https://github.com/nodemailer/nodemailer
Events
Introduced
ede574a257673d995bc441a7587131f2917cad71
Fixed
01957998adab6c56b3f63c17a39a72a3ff18f3f4
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "5.0.0"
        },
        {
            "fixed":  "10.0.2"
        },
        {
            "fixed":  "10.0.1"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v10.*
v10.0.0
v10.0.1
v5.*
v5.0.0
v5.0.1
v5.1.0
v5.1.1
v6.*
v6.0.0
v6.1.0
v6.1.1
v6.2.0
v6.2.1
v6.3.0
v6.3.1
v6.4.0
v6.4.1
v6.4.10
v6.4.11
v6.4.12
v6.4.13
v6.4.14
v6.4.15
v6.4.16
v6.4.17
v6.4.18
v6.4.2
v6.4.3
v6.4.4
v6.4.5
v6.4.6
v6.4.7
v6.4.8
v6.5.0
v6.6.0
v6.6.1
v6.6.3
v6.6.4
v6.6.5
v6.7.0
v6.7.1
v6.7.2
v6.7.3
v6.7.4
v6.7.5
v6.7.6
v6.7.7
v6.7.8
v6.8.0
v6.9.0
v6.9.1
v6.9.10
v6.9.13
v6.9.14
v6.9.15
v6.9.16
v6.9.2
v6.9.3
v6.9.4
v6.9.5
v6.9.6
v6.9.7
v6.9.8
v7.*
v7.0.10
v7.0.11
v7.0.12
v7.0.13
v7.0.5
v7.0.6
v7.0.7
v7.0.9
v8.*
v8.0.0
v8.0.1
v8.0.10
v8.0.11
v8.0.2
v8.0.3
v8.0.4
v8.0.5
v8.0.6
v8.0.7
v8.0.8
v8.0.9
v9.*
v9.0.0
v9.0.1
v9.0.2
v9.0.3
v9.0.4
v9.0.5
v9.0.6
v9.1.0
v9.1.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100701.json"