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GHSA-rmp5-5jj7-gmvf

Fix: mantisbt/mantisbt@de7bdee

GHSA-rmp5-5jj7-gmvf is a security vulnerability in mantisbt/mantisbt. O3 Security confirms whether GHSA-rmp5-5jj7-gmvf is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

MantisBT has an authorization bypass that allows reading attachments after losing access to a private issue

Also known asCVE-2026-34744
Published
May 11, 2026
Updated
Jun 5, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Jun 5, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘mantisbt/mantisbt

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

MantisBT permits a user to list and download their own attachments from an Issue created by another user, even after that Issue becomes private and direct access to it is denied.

Impact

The loss of confidentiality caused by this vulnerability is minimal, considering that only the attachments that were previously uploaded by the user themselves remains accessible.

Patches

  • de7bdeec36de066235e38a77bf056917d951c84d

Workarounds

None.

Credits

Thanks to Vishal Shukla for discovering and responsibly reporting the issue.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmantisbt/mantisbtall versions2.28.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mantisbt/mantisbt. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update mantisbt/mantisbt to 2.28.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rmp5-5jj7-gmvf is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-rmp5-5jj7-gmvf is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-rmp5-5jj7-gmvf. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

MantisBT permits a user to list and download their own attachments from an Issue created by another user, even after that Issue becomes private and direct access to it is denied. ### Impact The loss of confidentiality caused by this vulnerability is minimal, considering that only the attachments that were previously uploaded by the user themselves remains accessible. ### Patches - de7bdeec36de066235e38a77bf056917d951c84d ### Workarounds None. ### Credits Thanks to Vishal Shukla for discovering and responsibly reporting the issue.
O3 Security · Impact-Aware SCA

Is GHSA-rmp5-5jj7-gmvf in your dependencies?

O3 detects GHSA-rmp5-5jj7-gmvf across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-rmp5-5jj7-gmvf: mantisbt/mantisbt | O3 Security