CVE-2026-48147
Budibase is an open-source low-code platform. Prior to 3.35.4, the buildMatcherRegex() / matches() functions in packages/backend-core/src/middleware/matchers.ts route patterns are compiled into unanchored regular expressions and tested against ctx.request.url, which includes the full query string. The CSRF middleware in the Budibase Worker uses this matching system to decide whether to skip CSRF token validation. An unauthenticated attacker can forge state-changing cross-origin requests against any Worker API endpoint by injecting a public route pattern into the query string, causing the CSRF middleware to skip token validation entirely. This allows actions such as sending admin invites, modifying global configuration, and managing users without a valid CSRF token. This vulnerability is fixed in 3.35.4.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS probability
- 0.11%
- CWE
- CWE-185, CWE-352
- Published
- 2026-05-27
- Last modified
- 2026-05-27
Affected products
- Budibase budibase
Weakness type
Related vulnerabilities
- CVE-2026-73425 — @astrojs/netlify generates an overly-broad Netlify Image CDN allowlist because remotePatterns.pathname metacharacters are not escaped
- CVE-2026-64655 — GitHub CLI: Attestation Verification Bypass via Unescaped Regex Metacharacters in SAN Matching
- CVE-2026-45065 — Symfony: UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection
- CVE-2026-56021 — Webmin information disclosure via regex pattern
- CVE-2026-47674 — Hono: IP Restriction bypasses static deny rules for non-canonical IPv6
- CVE-2026-4296 — Incorrect Regular Expression vulnerability in GitHub Enterprise Server allowed unauthorized access to user accounts via OAuth callback URL validation bypass
- CVE-2026-25542 — Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching
- CVE-2026-39350 — Istio AuthorizationPolicy Incorrect Regex Matching of Dots in serviceAccounts Fields Allows Policy Bypass