CVE-2026-126269

NocoDB before 2026.09.0 Stored XSS via Attachment MIME Type

Published Nov 13, 2026 CVSS 4.0 · 9.3 Critical EPSS n/a KEV · Not listed

Description

NocoDB before 2026.09.0 contains a stored cross-site scripting vulnerability that allows authenticated Editor users to execute scripts by storing crafted attachment MIME types like text/html;image/png. Attackers can write the value through the records API so the /dltemp signed URL serves HTML inline, stealing session tokens from localStorage to impersonate victims.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

nocodb

unaffected

Version	Status	Constraints
`0`	affected	< 2026.09.0
`2026.09.0`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/nocodb/nocodb/security/advisories/GHSA-3f7w-wqf7-786q
https://www.vulncheck.com/advisories/nocodb-before-2026.09.0-stored-xss-via-attachment-mime-type

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		NocoDB before 2026.09.0 contains a stored cross-site scripting vulnerability that allows authenticated Editor users to execute scripts by storing crafted attachment MIME types like text/html;image/png. Attackers can write the value through the records API so the /dltemp signed URL serves HTML inline, stealing session tokens from localStorage to impersonate victims.
Title		NocoDB before 2026.09.0 Stored XSS via Attachment MIME Type
First Time appeared		Nocodb Nocodb nocodb
Weaknesses		CWE-79
CPEs		cpe:2.3:a:nocodb:nocodb::::::::
Vendors & Products		Nocodb Nocodb nocodb
References		https://github.com/nocodb/nocodb/security/advisories/GHSA-3f7w-wqf7-786q https://www.vulncheck.com/advisories/nocodb-before-2026.09.0-stored-xss-via-attachment-mime-type
Metrics		cvssV3_1 `{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}` cvssV4_0 `{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'}`