What is CVE-2026-27189?

CVE-2026-27189 is a medium-severity vulnerability in Opensift, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.6/10. Published 2026-02-21.

How severe is CVE-2026-27189?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in Opensift

CVE-2026-27189

OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below, use non-atomic and insufficiently synchronized local JSON persistence flows, potentially causing concurrent operations to lose updates or corrupt local state across sessions/study/quiz/flashcard/wellness/auth stores. This issue has been fixed in version 1.1.3-alpha.

Vulnerability class: Race Condition

EPSS: 0.001 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.

Affected products

Opensift — versions < 1.1.3-alpha

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-27189?: CVE-2026-27189 is a medium-severity vulnerability in Opensift, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.6/10. Published 2026-02-21.
How severe is CVE-2026-27189?: Medium severity. CVSS v3 base score is 6.6 out of 10.