CVE-2026-27169 OpenSift: Persistent XSS Chat Tool Rendering
Attackers can inject malicious scripts into stored study content, executing code in victims' browsers to hijack sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-27169?
CVE-2026-27169 is a high-severity cross-site scripting vulnerability in OpenSift, published on 20 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-27169?
It affects 1 product.
Products include Opensift Opensift.
How do I fix CVE-2026-27169?
No fix has been published for CVE-2026-27169 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-27169 being exploited?
There is no known exploitation of CVE-2026-27169 in the wild and no public exploit code.
Other vulnerabilities in OpenSift
- CVE-2026-28676 OpenSift: Insufficient path containment checks in storage helpers could allow path traversal-style file operations
- CVE-2026-28677 OpenSift: Insufficient URL destination restrictions in ingest flow could enable SSRF-style internal access
- CVE-2026-27170 OpenSift: SSRF risk in URL ingestion endpoint
- CVE-2026-27189 OpenSift: Race-prone local persistence could cause state corruption/loss
- CVE-2026-28675 OpenSift: Sensitive implementation details exposed via raw exception messages and token-returning endpoints
Sources
Also known as GHSA-qrpx-7cmv-5gv5.