CVE•Published 2026-04-06•Modified 2026-04-09•0 articles on news•5 live references•NVD data

CVE-2026-35391Bulwarkmail · Webmail

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS percentile

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Weaknesses (CWE)

CWE-348Use of Less Trusted Source

Description

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP() function in lib/admin/session.ts trusted the first (leftmost) entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to bypass IP-based rate limiting (enabling brute-force attacks against the admin login) or forge audit log entries (making malicious activity appear to originate from arbitrary IP addresses). This vulnerability is fixed in 1.4.11.

Timeline

Published 2026-04-06

Modified 2026-04-09

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-35391

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Bulwarkmail Webmail"

All exposed Bulwarkmail Webmail instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Webmail"

HTTP body or banner mentions "Webmail" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-35391