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CVE-2026-121419

8.1, high

surrealdb Improper Privilege Management Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.1, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
3 Nov 2026yesterday

Description

SurrealDB from 3.1.0 before 3.3.0 contains an improper authentication vulnerability where the MCP BoundSubject fingerprint uses the access method name instead of per-user identity for JWT/Bearer access. Attackers with a valid low-privilege token for the same access method and a victim's mcp-session-id can hijack the session and execute MCP tools with the victim's roles and permissions.

Details

Vendor
Surrealdb
Product
surrealdb
Weakness
CWE-269 (opens in a new tab)
Status
Deferred
Updated
3 Nov 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Surrealdb CVEs

Every Surrealdb CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-109334 surrealdb Authorization Bypass Through User-Controlled Key Vulnerability EPSS 0.3% 8.1, high
  • CVE-2026-109341 surrealdb Exposure of Sensitive Information Vulnerability EPSS 0.3% 7.1, high
  • CVE-2026-109343 surrealdb Authorization Bypass Through User-Controlled Key Vulnerability EPSS 0.3% 8.1, high

Beyond this page

Is CVE-2026-121419 in your network?

This page tells you how dangerous CVE-2026-121419 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Find it before attackers do

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 4 Nov 2026, not the live upstream state.