CVE-2026-27169

OpenSift: Persistent XSS Chat Tool Rendering

HIGH
8.9
CVSS Score
Published: February 20, 2026 at 11:51 PM UTC
Updated: June 17, 2026 at 10:26 AM UTC
1 product affected across 1 vendorOpenSift

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Severity
HIGH8.9
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.1.3v < 1.1.3-alpha
Affected range stops below 1.1.3-alpha, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/OpenSift/OpenSift/security/advisories/GHSA-qrpx-7cmv-5gv5
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/OpenSift/OpenSift/releases/tag/v1.1.3-alpha

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.9HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79CWE-116

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