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Vulnerability record · CVE-2026-27169 · published 21 February 2026

CVE-2026-27169: Opensift cross-site scripting vulnerability

OOpensift · Opensift

OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below render untrusted user/model content in chat tool UI surfaces using unsafe HTML interpolation patterns, leading to XSS. Stored content can execute JavaScript when later viewed in authenticated sessions. An attacker who can influence stored study/quiz/flashcard content could trigger script execution in a victim’s browser, potentially performing actions as that user in the local app session. This issue has been fixed in version 1.1.3-alpha.

8.9 CVSS 3.1 High EPSS 0.47% · top 61.7% CWE-79 · Cross-site scriptingCWE-116 · CWE-116
8.9CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. Versions 1.1.2-alpha and below render untrusted user/model content in chat tool UI surfaces using unsafe HTML interpolation patterns, leading to XSS. Stored content can execute JavaScript when later viewed in authenticated sessions. An attacker who can influence stored study/quiz/flashcard content could trigger script execution in a victim’s browser, potentially performing actions as that user in the local app session. This issue has been fixed in version 1.1.3-alpha.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/OpenSift/OpenSift/releases/tag/v1.1.3-alpha ProductRelease Notes
https://github.com/OpenSift/OpenSift/security/advisories/GHSA-qrpx-7cmv-5gv5 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-27169), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.