What is CVE-2026-34833?

CVE-2026-34833 is a high-severity vulnerability in Bulwarkmail Webmail, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2026-04-02.

How severe is CVE-2026-34833?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Bulwarkmail Webmail

CVE-2026-34833

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 brows…

EPSS: 0.002 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Bulwarkmail Webmail — versions < 1.4.10

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34833?: CVE-2026-34833 is a high-severity vulnerability in Bulwarkmail Webmail, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2026-04-02.
How severe is CVE-2026-34833?: High severity. CVSS v3 base score is 7.5 out of 10.