CVE-2026-35391

8.7 highEPSS 0.1%

High (8.7) in bulwarkmail webmail. EPSS 0.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
CWE: CWE-348
Published: 2026-04-06
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

bulwarkmail:webmail

References

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

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