CVE-2026-34834

8.7 highEPSS 0.3%

High (8.7) in bulwarkmail webmail. EPSS 0.3% chance of exploitation in the next 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.

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: 0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-31)
CWE: CWE-287
Published: 2026-04-02
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

bulwarkmail:webmail

References

https://github.com/bulwarkmail/webmail/releases/tag/1.4.10
https://github.com/bulwarkmail/webmail/security/advisories/GHSA-4356-876g-rfmh

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