CVE-2026-124016

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-124016
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-124016.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-124016
Aliases
  • GHSA-q8wm-54mj-r36p
Published
2026-11-10T19:22:30Z
Modified
2026-11-11T10:47:26Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
postal-mime < 4.2.1 Algorithmic Complexity DoS via processLine
Details

postal-mime before 4.2.1 contains an algorithmic complexity denial of service vulnerability that allows unauthenticated remote attackers to cause excessive CPU consumption in the PostalMime.processLine() function by crafting deeply nested multipart email messages with boundary lines sharing long prefixes with open boundaries. Attackers can deliver a malicious email with nesting up to the default maxNestingDepth of 256, causing per-line parsing cost to scale as O(depth x shared prefix length) and blocking the Node.js event loop for seconds per message.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124016.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"
        },
        {
            "original_tag": "v4.2.1",
            "range": [
                {
                    "fixed": "5828feb9a79e48f8d64bfd0b9ef71c7f607bfb5d"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

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-2026-124016.json"