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  4. CVE 2026 80203 grav before 1018 authentication bypass via scoped
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-80203

Grav before 1.0.18 Authentication Bypass via Scoped API KeyCVE-2026-80203

Answer in brief

CVE-2026-80203 records a Critical severity (CVSS 9.8) vulnerability in Grav before 1.0.18 Authentication Bypass via Scoped API Key. The current sources do not mark it as known exploited. The current feed maps getgrav/grav (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 Aug 26, 2026Updated Sep 3, 2026Source checked Oct 10, 2026First seen by HOL Aug 26, 2026Material review Sep 3, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. 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 getgrav/grav (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
getgrav/gravgeneric>=0 <1.0.181.0.18

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for getgrav/grav.
  2. 2Review the reported fix. Update getgrav/grav to 1.0.18 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 26, 2026

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

  2. Source modified

    Sep 3, 2026

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

  3. First seen by HOL

    Aug 26, 2026

Sources and claim methodology

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

The getgrav/grav-plugin-api plugin before 1.0.18 does not enforce API-key scope in the requireNotSuperTarget() function in UsersController.php across seven sensitive user-management endpoints. The check uses isSuperAdmin() on the acting account rather than verifying whether the specific API key carries super authority (via isSuperWithinScope()). As a result, an API key scoped below full super authority but belonging to a super-admin account can act against other super-admin accounts—disabling their 2FA, deleting their avatar, minting new API keys under their identity, or deleting their existing API keys.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Strapi 5.47.0 through 5.57.0 Improper Authorization via Admin API Token Field PermissionsAlso CWE-863
  • SkillHub before 0.2.22 Account Takeover via Account Merge FlowAlso CWE-863
  • 1MCP Agent 0.20.0 through 0.39.0 OAuth Tag-Scope Bypass via Negated Tag FilterAlso CWE-863
  • Phi 0.3.0 through 0.28.4 Permission Bypass via agent_spawn WorkdirAlso CWE-863
  • ExtUtils::Typemaps::STL::Vector versions before 1.05 for Perl allocate a 32 GiB array on an empty listSame generic ecosystem
  • WordPress Forminator plugin <= 1.57.3 - Cross Site Scripting (XSS) vulnerabilitySame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-863
Source
CVE List V5
Source checked
Oct 10, 2026
References
2 linked sources
Open source record