VulnSocial

CVE-2026-84796Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Craft CMS versions before 5.10.11 contain a site scope bypass vulnerability in GraphQL entry mutation resolvers that fail to validate siteId through ArgumentManager::prepareArguments(). Attackers with tokens scoped to one site can read, modify, or delete entries across unauthorized sites by passing siteId directly in mutation arguments.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-02: 1Patch / Workaround · 2026-09-02: 1Technical Details · 2026-09-02: 109-02
Signal classification1 categories
Disclosure
1100.0%
Full discourse1 post
  • Upwind Security MDR@UpwindMDR
    Disclosure

    🚨High - Craft CMS GraphQL siteId Scope Bypass in Entry Mutations (CVE-2026-84796) Craft CMS GraphQL entry mutation resolvers fail to validate siteId in ArgumentManager::prepareArguments(), allowing a token scoped to one site to submit mutation args with a different siteId. This bypasses site scoping to read/modify/delete entries across unauthorized sites. 👉Affected: craftcms/cms < 5.10.11 | Upgrade to 5.10.11

    Post summary

    The advisory announces a high‑severity scope bypass in Craft CMS GraphQL entry mutations, provides technical details of the flaw, and recommends upgrading to version 5.10.11 to remediate the issue.

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