CVE-2026-113728

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Source
https://cve.org/CVERecord?id=CVE-2026-113728
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-113728.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-113728
Aliases
  • GHSA-24w9-8r42-8jwm
Published
2026-10-20T21:12:38Z
Modified
2026-10-21T10:46:16Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Bulwark Webmail: DNS-rebinding SSRF in public iCalendar fetch endpoint
Details

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.9.2, the unauthenticated POST /api/fetch-ical endpoint validates a caller-supplied hostname with one DNS lookup and then passes the URL to fetch, which performs a separate lookup for the socket connection. An attacker controlling authoritative DNS can return a public address during validation and then rebind the hostname to a loopback, private, link-local, or cloud metadata address for the connection, causing the server to return up to 10 MB of an internal HTTP or HTTPS response. The same check-then-fetch pattern also existed in authenticated JMAP login and TOTP token-exchange flows. This issue is fixed in version 1.9.2.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113728.json"
}
References

Affected packages

Git / github.com/bulwarkmail/webmail

Affected ranges

Type
GIT
Repo
https://github.com/bulwarkmail/webmail
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2f1192bb3285dea2c8b8ece461d52967fe0e6706
Fixed
3288589e5248dcc1da769cc578827a9ee1adc941
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "1.9.2"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "3288589e5248dcc1da769cc578827a9ee1adc941"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "1.9.2",
            "range":  [
                {
                    "fixed":  "2f1192bb3285dea2c8b8ece461d52967fe0e6706"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

1.*
1.3.0
1.3.9
1.4.0
1.4.10
1.4.11
1.4.14
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
1.4.9
1.5.0
1.5.1
1.5.2
1.5.3
1.5.4
1.6.0
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.6.7
1.7.0
1.7.1
1.9.0
1.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-113728.json"