CVE-2026-27169

OpenSift: Persistent XSS Chat Tool Rendering

State: Published
Severity: 8.9 High
Published: Feb 20, 2026
Updated: Feb 25, 2026
Reserved: Feb 18, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.9 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
OpenSiftOpenSift	< 1.1.3-alphaAffected

References

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