VulnSocial

CVE-2026-35389Disclosure(bulwarkmail / webmail)

LOWCVSS 7.5 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

bulwarkmail CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-295

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • webmail

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Affected systems

Vendors
bulwarkmail
Products
webmail

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-04-06: 2Technical Details · 2026-04-06: 204-06
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-35389 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 … https://www.cve.org/CVERecord?id=CVE-2026-35389 ----- Traducción: CVE-2026-35389 Bul… http://infoflow.cloud`

    Post summary

    An announcement of CVE-2026-35389, highlighting a missing certificate trust chain validation in S/MIME signatures for Bulwark Webmail prior to version 1.4.11, with no PoC, exploit, or patch details provided.

    0000043
    67 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-35389 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 … https://www.cve.org/CVERecord?id=CVE-2026-35389

    Post summary

    The CVE reveals that Bulwark Webmail’s S/MIME signature verification fails to check certificate trust chains, a flaw identified before version 1.4.11.

    00000180
    57.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appbulwarkmailwebmail---

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