# Jetbrains Ktor vulnerabilities

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

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Jetbrains Ktor: 2 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-123318, was published on 6 November 2026. 2 vulnerabilities in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 2
- Last 30 days: 2
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About Jetbrains Ktor

JetBrains framework for building asynchronous web applications and services in Kotlin.

## Latest Jetbrains Ktor vulnerabilities

- [CVE-2026-123318: JetBrains Ktor HTTP request smuggling in CIO engine](https://junglewise.ai/threats/cve-2026-123318-in-jetbrains-ktor-before-3-6-1-http-request-smuggling-was) (medium, CVSS 4.8, published 6 Nov 2026)
- [CVE-2026-123317: JetBrains Ktor session forgery in encrypted cookies](https://junglewise.ai/threats/cve-2026-123317-in-jetbrains-ktor-before-3-6-1-session-forgery-was-possible-via) (high, CVSS 8.1, published 6 Nov 2026)
- [CVE-2026-68762: JetBrains Ktor denial of service in WebSocket decompression](https://junglewise.ai/threats/cve-2026-68762-jetbrains-ktor-denial-of-service-in-websocket-decompression) (medium, CVSS 5.9, published 17 Aug 2026)

## Most severe Jetbrains Ktor vulnerabilities

- [CVE-2026-123317: JetBrains Ktor session forgery in encrypted cookies](https://junglewise.ai/threats/cve-2026-123317-in-jetbrains-ktor-before-3-6-1-session-forgery-was-possible-via) (high, CVSS 8.1, published 6 Nov 2026)
- [CVE-2026-68762: JetBrains Ktor denial of service in WebSocket decompression](https://junglewise.ai/threats/cve-2026-68762-jetbrains-ktor-denial-of-service-in-websocket-decompression) (medium, CVSS 5.9, published 17 Aug 2026)
- [CVE-2026-123318: JetBrains Ktor HTTP request smuggling in CIO engine](https://junglewise.ai/threats/cve-2026-123318-in-jetbrains-ktor-before-3-6-1-http-request-smuggling-was) (medium, CVSS 4.8, published 6 Nov 2026)

## Vulnerabilities per week

2 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 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 | 0 | 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 | 2 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Jetbrains technologies

- [Jetbrains YouTrack](https://junglewise.ai/threats/technologies/youtrack): 83 vulnerabilities
- [Jetbrains IntelliJ IDEA](https://junglewise.ai/threats/technologies/intellij-idea): 51 vulnerabilities
- [Jetbrains TeamCity](https://junglewise.ai/threats/technologies/teamcity): 34 vulnerabilities
- [Jetbrains Datalore](https://junglewise.ai/threats/technologies/datalore): 16 vulnerabilities
- [Jetbrains Hub](https://junglewise.ai/threats/technologies/hub): 11 vulnerabilities
- [Jetbrains Webstorm](https://junglewise.ai/threats/technologies/webstorm): 8 vulnerabilities
- [Jetbrains GoLand](https://junglewise.ai/threats/technologies/goland): 7 vulnerabilities
- [Jetbrains PyCharm](https://junglewise.ai/threats/technologies/pycharm): 7 vulnerabilities
- [Jetbrains CLion](https://junglewise.ai/threats/technologies/clion): 6 vulnerabilities
- [Jetbrains PhpStorm](https://junglewise.ai/threats/technologies/phpstorm): 6 vulnerabilities
- [Jetbrains Rider](https://junglewise.ai/threats/technologies/rider): 4 vulnerabilities
- [Jetbrains Toolbox App](https://junglewise.ai/threats/technologies/toolbox-app): 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, "Jetbrains Ktor vulnerabilities", https://junglewise.ai/threats/technologies/ktor, 9 November 2026.