--- title: "CVE-2026-113728: Bulwark Webmail - Server Side Request Forgery" description: "Bulwark Webmail < 1.9.2 contains a server-side request forgery caused by DNS rebinding in hostname validation and fetch logic, letting attackers retrieve internal HTTP/HTTPS responses, exploit requires attacker-controlled authoritative DNS." url: https://panop.io/threat-heartbeat/CVE-2026-113728/ --- # CVE-2026-113728 Bulwark Webmail - Server Side Request Forgery Bulwark Webmail < 1.9.2 contains a server-side request forgery caused by DNS rebinding in hostname validation and fetch logic, letting attackers retrieve internal HTTP/HTTPS responses, exploit requires attacker-controlled authoritative DNS. CVSS base score 7.5 /10 High CISA KEV Not listed Public exploit None known [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-113728) ## Details Type Server Side Request Forgery Impact Server Side Request Forgery, Information Disclosure CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Published 20 October 2026 Updated 21 October 2026 Weakness [CWE-918](https://cwe.mitre.org/data/definitions/918.html) ## Vendor fix Update to version 1.9.2 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-113728](https://nvd.nist.gov/vuln/detail/CVE-2026-113728) - [https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941](https://github.com/bulwarkmail/webmail/commit/3288589e5248dcc1da769cc578827a9ee1adc941) - [https://github.com/bulwarkmail/webmail/releases/tag/1.9.2](https://github.com/bulwarkmail/webmail/releases/tag/1.9.2) - [https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm](https://github.com/bulwarkmail/webmail/security/advisories/GHSA-24w9-8r42-8jwm) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)