# CVE-2026-121736: NocoDB 0.300.0 before 2026.08.0 Unauthenticated OAuth Authorization Code Creation

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

NocoDB 0.300.0 before 2026.08.0 contains a missing authentication vulnerability in the POST /api/v2/oauth/authorize handler that allows unauthenticated attackers to create OAuth authorization codes. Attackers can send anonymous requests with client_id, redirect_uri and approved=true to insert unbounded ownerless authorization code records, limited only by rate limiting.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/nocodb/nocodb/commit/42128735eba328d157c2e90b98795cb248dc0847

## Affected products and versions

- nocodb / nocodb (nocodb): ≥ 0.300.0; < 2026.08.0 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nocodb/nocodb/commit/42128735eba328d157c2e90b98795cb248dc0847 (CNA: VulnCheck; patch)

- https://github.com/nocodb/nocodb (CNA: VulnCheck; product)

- https://github.com/nocodb/nocodb/security/advisories/GHSA-532v-ccph-m3xg (CNA: VulnCheck; vendor-advisory)

- https://github.com/nocodb/nocodb/blob/2026.07.0/packages/nocodb/src/modules/oauth/controllers/oauth.controller.ts#L56-L92 (CNA: VulnCheck; technical-description)

- https://github.com/nocodb/nocodb/releases/tag/2026.08.0 (CNA: VulnCheck; release-notes)

- https://www.vulncheck.com/advisories/nocodb-0.300.0-before-2026.08.0-unauthenticated-oauth-authorization-code-creation (CNA: VulnCheck; third-party-advisory)

- https://github.com/nocodb/nocodb (disclosure@vulncheck.com)

- https://github.com/nocodb/nocodb/blob/2026.07.0/packages/nocodb/src/modules/oauth/controllers/oauth.controller.ts#L56-L92 (disclosure@vulncheck.com)

- https://github.com/nocodb/nocodb/commit/42128735eba328d157c2e90b98795cb248dc0847 (disclosure@vulncheck.com)

- https://github.com/nocodb/nocodb/releases/tag/2026.08.0 (disclosure@vulncheck.com)

- https://github.com/nocodb/nocodb/security/advisories/GHSA-532v-ccph-m3xg (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/nocodb-0.300.0-before-2026.08.0-unauthenticated-oauth-authorization-code-creation (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-121736; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-121736; retrieved 2026-11-04; source updated 2026-11-03

Revision: 420cdc634a4524c9e2e9508c44642a6ac3f577003915fca71e268896cc6de39c

Canonical: https://y2.dev/cve/CVE-2026-121736

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