CVE-2026-26312

Source
https://cve.org/CVERecord?id=CVE-2026-26312
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26312.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26312
Aliases
  • GHSA-jm95-876q-c9gw
Published
2026-02-19T21:05:11.788Z
Modified
2026-02-21T10:08:47.890184Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Stalwart Mail Server has Out-of-Memory Denial of Service via Malformed Nested MIME Messages
Details

Stalwart is a mail and collaboration server. A denial-of-service vulnerability exists in Stalwart Mail Server versions 0.13.0 through 0.15.4 where accessing a specially crafted email containing malformed nested message/rfc822 MIME parts via IMAP or JMAP causes excessive CPU and memory consumption, potentially leading to an out-of-memory condition and server crash. The malformed structure causes the mail-parser crate to produce cyclical references in its parsed representation, which Stalwart then follows indefinitely. Version 0.15.5 contains a patch.

Database specific
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26312.json"
}
References

Affected packages

Git / github.com/stalwartlabs/stalwart

Affected ranges

Type
GIT
Repo
https://github.com/stalwartlabs/stalwart
Events

Affected versions

v0.*
v0.13.0
v0.13.1
v0.13.2
v0.13.3
v0.13.4
v0.14.0
v0.14.1
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.15.4

Database specific

source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26312.json"