JetBrains PyCharm: Schwachstelle ermöglicht Cross-Site Scripting
WID-SEC-2026-1743 · first 01.06.2026 · updated 01.06.2026 · CVSS 6,1
What it is about
PyCharm ist eine integrierte Entwicklungsumgebung (IDE) für Python Entwickler. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in JetBrains PyCharm ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Cross-Site Scripting Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- JetBrains PyCharm <2025.3.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- JetBrains PyCharm 2025.3.4
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Fixed security issues vom 2026-05-31 www.jetbrains.com
- EU Vulnerability Database vom 2026-05-31 euvd.enisa.europa.eu
CVE: CVE-2026-49384
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.