# CVE-2026-3816: OWASP DefectDojo SonarQubeParser/MSDefenderParser parser.py input_zip.read denial of service

> Remote attackers can cause denial of service in OWASP DefectDojo via malicious input to SonarQube or MSDefender parsers.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-22w8-2mrr-vh7h

## What is CVE-2026-3816?

CVE-2026-3816 is a medium-severity denial of service vulnerability in OWASP DefectDojo, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security vulnerability has been detected in OWASP DefectDojo up to 2.55.4. This vulnerability affects the function input_zip.read of the file parser.py of the component SonarQubeParser/MSDefenderParser. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 2.56.0 is able to resolve this issue. The identifier of the patch is e8f1e5131535b8fd80a7b1b3085d676295fdcd41. Upgrading the affected component is recommended.

Weakness: CWE-1284 (Improper Validation of Specified Quantity in Input), CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-3816?

It affects 1 product.


Products: Owasp Defectdojo.

## How do I fix CVE-2026-3816?

No fix has been published for CVE-2026-3816 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3816 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3816 exists.

## Other vulnerabilities in OWASP DefectDojo

- [CVE-2023-48171](https://insights.sbomify.com/CVE-2023-48171/): Privilege escalation in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3816 and fix it if it is affected.

What it is: CVE-2026-3816 is a medium-severity denial of service vulnerability in OWASP DefectDojo, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3816 exists.

Affected product: OWASP DefectDojo. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3816/ (Markdown: https://insights.sbomify.com/CVE-2026-3816/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3816
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3816
- OSV: https://osv.dev/vulnerability/CVE-2026-3816

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3816/
Summaries are generated and may contain mistakes; the official description above is the record.