Is CVE-2026-34834 actively exploited?

CVE-2026-34834 has no public evidence of in-the-wild exploitation as of 2026-04-09.

What is the CVSS score for CVE-2026-34834?

CVE-2026-34834 has a CVSS score of 8.7 (HIGH severity). Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-34834?

Patch guidance is available from bulwarkmail security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-34834.

Which products are affected by CVE-2026-34834?

1 product: bulwarkmail webmail.

Fix CVE-2026-34834 - HIGH bulwarkmail webmail

Description

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to version 1.4.10, the verifyIdentity() function contained logic that returned true if no session cookies were present. This allowed unauthenticated attackers to bypass security checks and access/modify user settings via the /api/settings endpoint by providing arbitrary headers. This issue has been patched in version 1.4.10.

CVSS Metrics

Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-287 · Improper Authentication

Metadata

Primary Vendor: BULWARKMAIL
Published: 4/2/2026
Last Modified: 4/9/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

bulwarkmail : webmail

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-34834. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-34834

View on NIST NVD

CVE-2026-34834 vulnerability