Vulnerability details
CVE-2026-45331
open-webui open-webui
Open WebUI: Full SSRF Vulnerability in the RAG Web Search Feature
CVSS 3.1
8.5High
Official description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, validate_url() in backend/open_webui/retrieval/web/utils.py calls validators.ipv6(ip, private=True), but the validators library does NOT implement the private keyword for IPv6 — the call raises a ValidationError (which is falsy in a boolean context), so every IPv6 address passes the filter. In addition, IPv4-mapped IPv6 (::ffff:10.0.0.1) bypasses the IPv4 check entirely, and several reserved IPv4 ranges (0.0.0.0/8, 100.64.0.0/10, 192.0.0.0/24, etc.) are not blocked. This vulnerability is fixed in 0.9.0.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| open-webui | open-webui | < 0.9.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/open-webui/open-webui/security/advisories/GHSA-4v7r-f4w8-8972 x_refsource_CONFIRM
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-05-15
- Last updated
- 2026-05-16
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.28%
Probability of exploitation in 30 days
21.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-918Server-Side Request Forgery (SSRF)