CVE-2026-35389

8.7 highEPSS 0.2%

High (8.7) in bulwarkmail webmail. EPSS 0.2% 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, S/MIME signature verification did not validate the certificate trust chain (checkChain: false). Any email signed with a self-signed or untrusted certificate was displayed as having a valid signature. 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: 0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-31)
CWE: CWE-295
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-v6w6-338p-p256

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