CVE-2026-70489: Open WebUI automation recurrence parsing denial of service vulnerability

# CVE-2026-70489: Open WebUI automation recurrence parsing denial of service vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-70489-open-webui-automation-recurrence-parsing-deni · AIR-2026-0047 · closed 2026-08-04

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-04
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-70489
- CVSS: 6.5

## Summary

An inefficient recurrence parsing implementation in Open WebUI can cause event loop blocking and availability impacts. A patch is available to address the parsing performance flaw.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-08-04: CVE-2026-70489: Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing (https://github.com/advisories/GHSA-73cq-mcgh-379c)
- 2026-08-04: CVE-2026-70489: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. (https://nvd.nist.gov/vuln/detail/CVE-2026-70489)

## Sources

- 2026-08-04 NVD: CVE-2026-70489: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. https://nvd.nist.gov/vuln/detail/CVE-2026-70489
- 2026-08-04 GitHub Advisory Database: CVE-2026-70489: Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing https://github.com/advisories/GHSA-73cq-mcgh-379c

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.