# QOS.CH Sarl vulnerabilities

Source: https://junglewise.ai/threats/vendors/qos-ch-sarl  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/qos-ch-sarl.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in QOS.CH Sarl: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-104721, was published on 2 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 4 (0 critical, 0 exploited in the wild)

## About QOS.CH Sarl

A software company founded by Ceki Gülcü, the creator of Log4j, SLF4J, and Logback.

## Latest QOS.CH Sarl vulnerabilities

- [CVE-2026-104721: Logback-classic path-traversal in MDC-based discriminator](https://junglewise.ai/threats/cve-2026-104721-path-traversal-vulnerability-in-qos-ch-sarl-logback-classic-on) (info, published 2 Oct 2026)
- [CVE-2026-10532: QOS.CH Sarl logback-core restricted deserialization in HardenedObjectInputStream](https://junglewise.ai/threats/cve-2026-10532-qos-ch-sarl-logback-core-restricted-deserialization-in) (medium, CVSS 4, published 1 Jun 2026)
- [CVE-2026-9828: QOS.CH logback-core deserialization bypass in HardenedObjectInputStream](https://junglewise.ai/threats/cve-2026-9828-qos-ch-logback-core-deserialization-bypass-in) (medium, CVSS 4, published 28 May 2026)
- [CVE-2025-11226: QOS.CH Logback-core code execution in conditional configuration processing](https://junglewise.ai/threats/cve-2025-11226-qos-ch-logback-core-code-execution-in-conditional-configuration) (medium, CVSS 4, published 1 Oct 2025)

## Most severe QOS.CH Sarl vulnerabilities

- [CVE-2026-9828: QOS.CH logback-core deserialization bypass in HardenedObjectInputStream](https://junglewise.ai/threats/cve-2026-9828-qos-ch-logback-core-deserialization-bypass-in) (medium, CVSS 4, published 28 May 2026)
- [CVE-2026-10532: QOS.CH Sarl logback-core restricted deserialization in HardenedObjectInputStream](https://junglewise.ai/threats/cve-2026-10532-qos-ch-sarl-logback-core-restricted-deserialization-in) (medium, CVSS 4, published 1 Jun 2026)
- [CVE-2025-11226: QOS.CH Logback-core code execution in conditional configuration processing](https://junglewise.ai/threats/cve-2025-11226-qos-ch-logback-core-code-execution-in-conditional-configuration) (medium, CVSS 4, published 1 Oct 2025)
- [CVE-2026-104721: Logback-classic path-traversal in MDC-based discriminator](https://junglewise.ai/threats/cve-2026-104721-path-traversal-vulnerability-in-qos-ch-sarl-logback-classic-on) (info, published 2 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## QOS.CH Sarl technologies

- [QOS.CH Sarl Logback-Core](https://junglewise.ai/threats/technologies/logback-core): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "QOS.CH Sarl vulnerabilities", https://junglewise.ai/threats/vendors/qos-ch-sarl, 9 November 2026.