Cyber Resilience

CVE-2026-49370

Low

Published: 29 May 2026

Published
29 May 2026
Modified
01 June 2026
KEV Added
—
Patch
—
CVSS Score v3.1 3.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N
EPSS Score 0.0023 13.5th percentile
Risk Priority 7 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-49370 is a low-severity Insertion of Sensitive Information Into Sent Data (CWE-201) vulnerability in Jetbrains Youtrack. Its CVSS base score is 3.4 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 13.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

In JetBrains YouTrack before 2026.1.13162 information disclosure was possible on fetchApp requests

CWE(s)
CWE-201

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1082 System Information Discovery Discovery
An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture.
attack.mitre.org →
Why these techniques?

Info disclosure vuln in public-facing YouTrack app directly enables T1190 exploitation and facilitates T1082 system info gathering via fetchApp requests.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

Affected Assets

jetbrains
youtrack
≤ 2026.1.13162

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-20 Tainting
addresses: CWE-201

Embedding taints allows detection when sensitive data is inserted into outbound or sent data streams.

References