High 8.7Published Apr 2, 2026

CVE-2026-34834Bulwark Webmail: Authentication Bypass in verifyIdentity() due to missing cookie validation

Updated under an hour ago (Oct 26, 2026, 4:20 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for bulwarkmail webmail

Exploited in the last 30 days

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: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

bulwarkmail webmail bulwarkmail:webmail (from the name)	before 1.4.10	CNA record
bulwarkmail webmail bulwarkmail:webmail	before 1.4.10	NVD

References

https://github.com/bulwarkmail/webmail/security/advisories/GHSA-4356-876g-rfmhx-refsource-confirm, vendor-advisory
https://github.com/bulwarkmail/webmail/releases/tag/1.4.10x-refsource-misc, product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.