CVE-2026-35391

EUVD-2026-19480

06.04.2026, 21:16

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 6%

Affected Products (NVD)

Vendor	Product	Version
bulwarkmail	webmail	𝑥 < 1.4.11

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-348 - Use of Less Trusted Source
The software has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.

References

https://github.com/bulwarkmail/webmail/security/advisories/GHSA-7pj2-232x-6698