XSS in Opensift
CVE-2026-27169
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Opensift — versions < 1.1.3-alpha
Weakness classification (CWE)
References
- github.com/OpenSift/OpenSift/security/advisories/GHSA-qrpx-7cmv-5gv5 (Vendor Advisory)
- github.com/OpenSift/OpenSift/releases/tag/v1.1.3-alpha (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-27169?
- CVE-2026-27169 is a high-severity vulnerability in Opensift, classified under Cross-site Scripting. CVSS score: 8.9/10. Published 2026-02-21.
- How severe is CVE-2026-27169?
- High severity. CVSS v3 base score is 8.9 out of 10.