# CVE-2026-5115: Session hijacking in PaperCut NG/MF embedded application for Konica Minolta devices

> Insecure communication in PaperCut embedded apps allows attackers to intercept sensitive data, potentially leading to session hijacking or phishing attacks on multi-function devices.

- **Severity:** Low 3.6 (`CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 31 Mar 2026
- **Updated:** 31 Mar 2026
- **Also known as:** GHSA-jh6p-v59c-g7f9

## What is CVE-2026-5115?

CVE-2026-5115 is a low-severity vulnerability in Papercut NG/MF, published on 31 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

The PaperCut NG/MF (specifically, the embedded application for Konica Minolta devices) is vulnerable to session hijacking. The PaperCut NG/MF Embedded application is a software interface that runs directly on the touch screen of a multi-function device.

It was internally discovered that the communication channel between the embedded application and the server was insecure, which could leak data including sensitive information that may be used to mount an  attack on the device. Such an attack could potentially be used to steal data or to perform a phishing attack on the end user.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2026-5115?

It affects 2 products.


Products: Papercut Papercut Mf, Papercut Papercut Mf Konica Minolta.

## How do I fix CVE-2026-5115?

No fix has been published for CVE-2026-5115 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5115 being exploited?

There is no known exploitation of CVE-2026-5115 in the wild and no public exploit code.

## Other vulnerabilities in Papercut NG/MF

- [CVE-2023-27350](https://insights.sbomify.com/CVE-2023-27350/): PaperCut MF/NG Improper Access Control (critical 9.8, exploited in the wild)
- [CVE-2026-82078](https://insights.sbomify.com/CVE-2026-82078/): PaperCut NG/MF Unsafe Reflection (critical 9.4, exploited in the wild)
- [CVE-2026-81578](https://insights.sbomify.com/CVE-2026-81578/): PaperCut NG/MF Missing Authentication for Critical Function (high 8.8, exploited in the wild)
- [CVE-2023-2533](https://insights.sbomify.com/CVE-2023-2533/): PaperCut NG/MF Cross-Site Request Forgery (CSRF) (high 8.4, exploited in the wild)
- [CVE-2023-27351](https://insights.sbomify.com/CVE-2023-27351/): PaperCut NG/MF Improper Authentication (high 8.2, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5115 and fix it if it is affected.

What it is: CVE-2026-5115 is a low-severity vulnerability in Papercut NG/MF, published on 31 Mar 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-5115 in the wild and no public exploit code.

Affected product: Papercut NG/MF. 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-2026-5115/ (Markdown: https://insights.sbomify.com/CVE-2026-5115/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5115
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5115
- OSV: https://osv.dev/vulnerability/CVE-2026-5115

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-5115/
Summaries are generated and may contain mistakes; the official description above is the record.