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Sunday, 13 September 2026
8 agent hacks today▲ 7 vs yesterday (1)
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Incident database

CVE-2026-45401: SSRF via unvalidated redirects in Open WebUI web retrieval

Open WebUI versions prior to 0.9.5 validated only the initial URL in validate_url(), while downstream HTTP clients followed 3xx redirects without re-checking private or metadata IP block lists. Any authenticated user could submit a public URL redirecting to internal addresses (e.g. 127.0.0.1, 169.254.169.254, RFC1918) and read internal response bodies through retrieval, image and chat completion endpoints.

Disclosed 15 May 2026 · Record updated 13 September 2026

Impact

Authenticated users could force the platform to fetch internal-only addresses and return the responses, exposing internal services and cloud metadata endpoints. Fixed in version 0.9.5.

Our coverage

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-45401