CVE-2026-34833: Bulwark Webmail: Information Exposure: password returned in /api/auth/session

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-02 · updated 2026-07-24
Weakness: CWE-312

Description

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to version 1.4.10, the GET /api/auth/session endpoint previously included the user's plaintext password in the JSON response. This exposed credentials to browser logs, local caches, and network proxie. This issue has been patched in version 1.4.10.

Affected products

bulwarkmail webmail: before 1.4.10 — fixed in 1.4.10

How to fix

Upgrade to a fixed version: bulwarkmail webmail 1.4.10. Check the vendor advisory for mitigations.

References

https://github.com/bulwarkmail/webmail/releases/tag/1.4.10
https://github.com/bulwarkmail/webmail/security/advisories/GHSA-47pm-883h-885r

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