CVE-2026-30849: Mantisbt/mantisbt Authentication Bypass Vulnerability

CRITICAL
Advisory Identifier: GHSA-phrq-pc6r-f6gh
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CWE-305
Published
Advisory Summary

CVE-2026-30849 is a CRITICAL authentication bypass vulnerability (CWE-305: Authentication Bypass by Primary Weakness) affecting Mantisbt/mantisbt libraries in the Packagist ecosystem. The issue involves mantisbt is vulnerable to authentication bypass through the soap api on mysql. Remediation is available by upgrading affected packages to version 2.28.1.

CVE-2026-30849 at a Glance

CVE Identifier CVE-2026-30849
GHSA Identifier GHSA-phrq-pc6r-f6gh
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-305: Authentication Bypass by Primary Weakness
Affected Product Mantisbt/mantisbt
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2026-30849

To remediate this vulnerability, upgrade all affected Mantisbt/mantisbt dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mantisbt/mantisbt fixed: 2.28.1 
Upgrade mantisbt/mantisbt to 2.28.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for mantisbt/mantisbt

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-30849, inspect your project dependencies for Mantisbt/mantisbt:

inspect dependencies for mantisbt/mantisbt

Analyze the terminal output to locate any version of Mantisbt/mantisbt in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.28.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-305: Authentication Bypass by Primary Weakness, where the authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. In Mantisbt/mantisbt, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Mantis Bug Tracker instances running on MySQL and compatible databases are affected by an authentication bypass vulnerability in the SOAP API, as a result of 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. ### Impact 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. ### Patches * b349e5c890eeda9bd82e7c7e14479853f8a30d9f ### Workarounds - [Disabling the SOAP API](https://mantisbt.org/docs/master/en-US/Admin_Guide/html-desktop/#admin.config.api.disable) significantly reduces the risk, but still allows the attacker to retrieve user account information including email address and real name. ### Resources - https://mantisbt.org/bugs/view.php?id=36902 ### Credits MantisBT thanks Alexander Philiotis of SynerComm for discovering and responsibly reporting the issue.

CVE-2026-30849 Affected Mantisbt/mantisbt Versions

1 component(s)
Fixed Versions:
2.28.1
Product / Package Ecosystem Affected Versions Fixed Version
mantisbt/mantisbt
 Packagist
< 2.28.1
2.28.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-phrq-pc6r-f6gh
NVD — CVE-2026-30849 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30849
Security Fix Commit FIX COMMIT
https://github.com/mantisbt/mantisbt/commit/b349e5c890eeda9bd82e7c7e14479853f8a30d9f
Mantisbt/mantisbt Source Repository REPOSITORY
https://github.com/mantisbt/mantisbt

Frequently Asked Questions

What is CVE-2026-30849?
CVE-2026-30849 is a security vulnerability in Mantisbt/mantisbt involving MantisBT is vulnerable to authentication bypass through the SOAP API on MySQL under CWE-305: Authentication Bypass by Primary Weakness.
Which Mantisbt/mantisbt versions are affected?
Affected versions include releases prior to 2.28.1 across affected packages: mantisbt/mantisbt.
What version fixes CVE-2026-30849?
Upgrading to 2.28.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mantisbt/mantisbt affected?
Yes, mantisbt/mantisbt is affected in releases prior to 2.28.1. Upgrade your dependency to 2.28.1 or later.
What CWE is associated with CVE-2026-30849?
CVE-2026-30849 is classified under CWE-305: Authentication Bypass by Primary Weakness (The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.).
How can I check Packagist dependencies for CVE-2026-30849?
Run the dependency tree command: 'inspect dependencies for mantisbt/mantisbt'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-phrq-pc6r-f6gh",
  "modified" : "2026-03-25T20:44:16Z",
  "published" : "2026-03-23T20:28:52Z",
  "aliases" : [ "CVE-2026-30849" ],
  "summary" : "MantisBT is vulnerable to authentication bypass through the SOAP API on MySQL",
  "details" : "Mantis Bug Tracker instances running on MySQL and compatible databases are affected by an authentication bypass vulnerability in the SOAP API, as a result of improper type checking on the password parameter.\n\nOther database backends are not affected, as they do not perform implicit type conversion from string to integer.\n\n### Impact\nUsing 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.\n\n### Patches\n* b349e5c890eeda9bd82e7c7e14479853f8a30d9f\n\n### Workarounds\n- [Disabling the SOAP API](https://mantisbt.org/docs/master/en-US/Admin_Guide/html-desktop/#admin.config.api.disable) significantly reduces the risk, but still allows the attacker to retrieve user account information including email address and real name.\n\n### Resources\n- https://mantisbt.org/bugs/view.php?id=36902\n\n### Credits\nMantisBT thanks Alexander Philiotis of SynerComm for discovering and responsibly reporting the issue.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "mantisbt/mantisbt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.28.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-phrq-pc6r-f6gh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-30849"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mantisbt/mantisbt/commit/b349e5c890eeda9bd82e7c7e14479853f8a30d9f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mantisbt/mantisbt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-305" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-23T20:28:52Z",
    "nvd_published_at" : "2026-03-23T20:16:25Z"
  }
}