getgrav Grav up to 2.0.15 Twig Templates offsetGet/offsetexists privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.32

Summaryinfo

A vulnerability classified as problematic was found in getgrav Grav up to 2.0.15. Affected by this issue is the function offsetGet/offsetexists of the component Twig Templates. Executing a manipulation can lead to privileges management. This vulnerability is tracked as CVE-2026-76839. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in getgrav Grav up to 2.0.15. This vulnerability affects the function offsetGet/offsetexists of the component Twig Templates. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality. CVE summarizes:

Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-76839 since 08/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 2.0.16 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Grav 2.0.16

Timelineinfo

08/19/2026 CVE reserved
08/25/2026 +6 days Advisory disclosed
08/25/2026 +0 days VulDB entry created
08/25/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-76839 (🔒)
GCVE (CVE): GCVE-0-2026-76839
GCVE (VulDB): GCVE-100-394912

Entryinfo

Created: 08/25/2026 04:18
Changes: 08/25/2026 04:18 (77)
Complete: 🔍
Cache ID: 216::103

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