What is CVE-2026-57926?

CVE-2026-57926 is a low-severity vulnerability in Jetbrains Youtrack, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 2.6/10. Published 2026-06-26.

How severe is CVE-2026-57926?

Low severity. CVSS v3 base score is 2.6 out of 10.

Prototype Pollution in Jetbrains Youtrack

CVE-2026-57926

In JetBrains YouTrack before 2026.2.16593 the websandbox bridge was vulnerable to a prototype pollution attack

Vulnerability class: Prototype Pollution

CVSS v3 metric

CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

Jetbrains Youtrack — versions 0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

cve@jetbrains.com

Frequently asked questions

What is CVE-2026-57926?: CVE-2026-57926 is a low-severity vulnerability in Jetbrains Youtrack, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 2.6/10. Published 2026-06-26.
How severe is CVE-2026-57926?: Low severity. CVSS v3 base score is 2.6 out of 10.