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Back to active CVEs
High · CVSS 8.6CVE-2026-121419

SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject CollisionCVE-2026-121419

Answer in brief

CVE-2026-121419 records a High severity (CVSS 8.6) vulnerability in SurrealDB 3.1.0 before 3.3.0 MCP Session Hijack via BoundSubject Collision. The current sources do not mark it as known exploited. The current feed maps surrealdb/surrealdb (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 3, 2026Updated Nov 3, 2026Source checked Nov 3, 2026First seen by HOL Nov 3, 2026Material review Nov 3, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps surrealdb/surrealdb (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
surrealdb/surrealdbgeneric>=3.1.0 <3.3.03.3.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for surrealdb/surrealdb.
  2. 2Review the reported fix. Update surrealdb/surrealdb to 3.3.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 3, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • GLPI 10.0.0 before 10.0.28 and 11.0.0 before 11.0.10 Privilege Escalation via User CloningAlso CWE-269

Record context

Vulnerability class
Privilege Escalation
EPSS
Not reported
CWE IDs
CWE-269
Source
CVE List V5
Source checked
Nov 3, 2026
References
2 linked sources
Open source record