CVE-2026-125756

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-125756
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-125756.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-125756
Aliases
  • GHSA-jh3p-792r-98gm
Published
2026-11-10T15:22:50Z
Modified
2026-11-11T02:48:49Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
postal-mime before 4.2.1 Sender Spoofing via Address Parser Domain Truncation
Details

postal-mime before 4.2.1 contains a parser differential vulnerability in its address parser that truncates the domain at folding whitespace or comments preceding a dot. Remote attackers can craft From headers that pass SPF/DKIM/DMARC alignment for their own subdomain while PostalMime.parse() reports a spoofed victim sender address.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-436"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/125xxx/CVE-2026-125756.json"
}
References

Affected packages

Git / github.com/postalsys/postal-mime

Affected ranges

Type
GIT
Repo
https://github.com/postalsys/postal-mime
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5828feb9a79e48f8d64bfd0b9ef71c7f607bfb5d
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "4.2.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

v1.*
v1.0.1
v1.0.10
v1.0.11
v1.0.12
v1.0.13
v1.0.14
v1.0.15
v1.0.16
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.0.9
v1.1.0
v2.*
v2.0.0
v2.0.2
v2.1.0
v2.1.1
v2.1.2
v2.2.1
v2.2.2
v2.2.7
v2.3.2
v2.4.0
v2.4.1
v2.4.2
v2.4.6
v2.5.0
v2.6.0
v2.6.1
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.7.5
v2.7.6
v3.*
v3.0.0
v3.0.1
v4.*
v4.0.0
v4.0.1
v4.0.10
v4.0.11
v4.0.2
v4.0.3
v4.0.4
v4.0.5
v4.0.6
v4.0.7
v4.0.8
v4.0.9
v4.1.0
v4.1.1
v4.1.2
v4.1.3
v4.1.4
v4.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-125756.json"