# CVE-2026-27189: OpenSift: Race-prone local persistence could cause state corruption/loss

> Concurrent operations in OpenSift can corrupt or lose local state data due to non-atomic persistence, requiring an upgrade to fix.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Feb 2026
- **Updated:** 25 Feb 2026
- **Also known as:** GHSA-3pmp-j953-whxq

## What is CVE-2026-27189?

CVE-2026-27189 is a medium-severity vulnerability in OpenSift, published on 21 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### 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, use non-atomic and insufficiently synchronized local JSON persistence flows, potentially causing concurrent operations to lose updates or corrupt local state across sessions/study/quiz/flashcard/wellness/auth stores. This issue has been fixed in version 1.1.3-alpha.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition), CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2026-27189?

It affects 1 product.


Products: Opensift Opensift.

## How do I fix CVE-2026-27189?

No fix has been published for CVE-2026-27189 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-27189 being exploited?

There is no known exploitation of CVE-2026-27189 in the wild and no public exploit code.

## Other vulnerabilities in OpenSift

- [CVE-2026-27169](https://insights.sbomify.com/CVE-2026-27169/): OpenSift: Persistent XSS Chat Tool Rendering (high 8.9)
- [CVE-2026-28676](https://insights.sbomify.com/CVE-2026-28676/): OpenSift: Insufficient path containment checks in storage helpers could allow path traversal-style file operations (high 8.8)
- [CVE-2026-28677](https://insights.sbomify.com/CVE-2026-28677/): OpenSift: Insufficient URL destination restrictions in ingest flow could enable SSRF-style internal access (high 8.2)
- [CVE-2026-27170](https://insights.sbomify.com/CVE-2026-27170/): OpenSift: SSRF risk in URL ingestion endpoint (high 7.1)
- [CVE-2026-28675](https://insights.sbomify.com/CVE-2026-28675/): OpenSift: Sensitive implementation details exposed via raw exception messages and token-returning endpoints (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-27189 and fix it if it is affected.

What it is: CVE-2026-27189 is a medium-severity vulnerability in OpenSift, published on 21 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-27189 in the wild and no public exploit code.

Affected product: OpenSift. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-27189/ (Markdown: https://insights.sbomify.com/CVE-2026-27189/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27189
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27189
- OSV: https://osv.dev/vulnerability/CVE-2026-27189

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-27189/
Summaries are generated and may contain mistakes; the official description above is the record.