PatchTheCVECVE-2026-34833: Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server
CVE-2026-34833 is a high-severity flaw (CVSS 7.5) affecting webmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 94%) |
| CISA exploited list | No |
| Weakness | CWE-312 |
| Published | 2026-04-02 |
| Last modified | 2026-07-24 |
Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34833?
webmail: upgrade to 1.4.10. Exact commands for each OS are on this page.
Is CVE-2026-34833 being exploited?
CVE-2026-34833 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34833 affect?
CVE-2026-34833 affects webmail. Severity is high (CVSS 7.5). 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 browse
How urgent is CVE-2026-34833?
Priority 33/100. High severity; Remotely exploitable, no login, no user action
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