What’s Vulnerable › Vulnerabilities

CVE-2026-73307: Budibase: SSRF via bare fetch() in uploadUrl during AI table generation

• Severity: medium (CVSS 4.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-12 · updated 2026-09-08
• Weakness: CWE-918

Description

Budibase is an open-source low-code platform. Prior to 3.39.4, uploadUrl in packages/server/src/utilities/fileUtils.ts used a bare server-side fetch for string attachment values passed by processAttachments in packages/server/src/sdk/workspace/ai/helpers/rows.ts. A builder with the AI table-generation feature could cause an attachment value to reference an internal service or cloud metadata endpoint, and the response would be stored as an attachment without fetchWithBlacklist validation. This issue is fixed in version 3.39.4.

Affected products

• budibase: before 3.39.4

References

• https://github.com/Budibase/budibase/commit/fc8161e739bdc5513c4314282251e327e7fe339f
• https://github.com/Budibase/budibase/pull/18866
• https://github.com/Budibase/budibase/releases/tag/3.39.4
• https://github.com/Budibase/budibase/security/advisories/GHSA-hfhx-w8p8-4hc7
• https://github.com/Budibase/budibase/security/advisories/GHSA-hfhx-w8p8-4hc7

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