---
title: "CVE-2026-30849: MantisBT is vulnerable to authentication bypass through the SOAP API on MySQL"
url: https://erroneo.us/security/cve/CVE-2026-30849/
description: "CVE-2026-30849 (mantisbt/mantisbt (Composer (PHP))): Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions prior to 2.28.1 running on…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-23
date_modified: 2026-03-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-30849"
kev: false
cvss: 9.3
epss: 0.02351
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-30849: MantisBT is vulnerable to authentication bypass through the SOAP API on MySQL

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 2.4% , percentile 84: FIRST’s model estimates a 2.4% chance of exploitation activity in the next 30 days, higher than 84% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes mantisbt/mantisbt (Composer (PHP)) < 2.28.1, fixed in 2.28.1 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Composer (PHP) `mantisbt/mantisbt` < 2.28.1 → fixed: 2.28.1

## Affected products (CVE record)

- mantisbt mantisbt: < 2.28.1

## Severity

- GitHub_M CVSS 4.0: 9.3 `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`
- GitHub CVSS 4.0: 9.3 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 2.35% probability of exploitation activity in the next 30 days; percentile 84.

## Sources

- [GitHub Advisory GHSA-phrq-pc6r-f6gh](https://github.com/advisories/GHSA-phrq-pc6r-f6gh)
- [CVE.org record CVE-2026-30849](https://www.cve.org/CVERecord?id=CVE-2026-30849)
- [NVD entry CVE-2026-30849](https://nvd.nist.gov/vuln/detail/CVE-2026-30849)
- [github.com](https://github.com/mantisbt/mantisbt/security/advisories/GHSA-phrq-pc6r-f6gh)
- [github.com](https://github.com/mantisbt/mantisbt/commit/b349e5c890eeda9bd82e7c7e14479853f8a30d9f)

---
Source page: https://erroneo.us/security/cve/CVE-2026-30849/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt