CVE-2026-35390Disclosure(bulwarkmail / webmail)

LOWCVSS 5.4 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch bulwarkmail webmail systems immediately

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, the reverse proxy (proxy.ts) set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting (XSS) attacks were logged but not blocked. Any user who could inject script content (e.g., via crafted email HTML) could execute arbitrary JavaScript in the context of the application, potentially stealing session tokens or performing actions on behalf of the user. This vulnerability is fixed in 1.4.11.

bulwarkmail CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://github.com/bulwarkmail/webmail/security/advisories/GHSA-6q52-98cr-qx65

Weakness type (CWE)

CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

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

Patch or workaround signal is available
2 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 1 signal
Disclosure: 2 classified signals
2 total mentions across 1 day

Affected systems

Vendors

bulwarkmail

Products

webmail

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud186d
Disclosure
🚨*CVE* CVE-2026-35390 Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy (proxy.ts) set the Content-Security-Policy-Report-Only he… https://www.cve.org/CVERecord?id=CVE-2026-35390 ----- Traducción: CVE-2026-35390 Bul… http://infoflow.cloud`
Post summary
An announcement of CVE-2026-35390 affecting Bulwark Webmail, noting a configuration issue with the reverse proxy, but providing no PoC, exploit, patch, or technical depth beyond a brief description.
0000042
67 followersView on X
CVE@CVEnew186d
Disclosure
CVE-2026-35390 Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy (proxy.ts) set the Content-Security-Policy-Report-Only he… https://www.cve.org/CVERecord?id=CVE-2026-35390
Post summary
Describes a CSP header configuration issue in Bulwark Webmail’s reverse proxy, noting that version 1.4.11 addresses the problem.
00000184
57.0K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	bulwarkmail	webmail	-	-	-

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