CVE-2026-46639: CWE-693: Protection Mechanism Failure in twigphp Twig
Twig versions from 3.24.0 up to but not including 3.26.0 contain a protection mechanism failure where sandbox policy checks are disabled during object-destructuring assignment. This allows an attacker with write access to a sandboxed Twig template to read public properties or invoke public getters on objects passed to the template engine. The issue is fixed in version 3.26.0.
AI Analysis
Technical Summary
The vulnerability in Twig (CVE-2026-46639) arises from the CoreExtension::getAttribute() method being compiled with the sandbox argument hardcoded to false during object-destructuring assignment in versions 3.24.0 through 3.25.x. This disables property and method policy checks intended to enforce sandbox restrictions, enabling an attacker with write access to a sandboxed template to access public properties or invoke public getters on objects. This represents a protection mechanism failure (CWE-693). The vulnerability is resolved in Twig version 3.26.0.
Potential Impact
An attacker who can write to a sandboxed Twig template can bypass sandbox restrictions to read public properties or invoke public getters on objects passed to the template engine. This could lead to unauthorized information disclosure within the context of the application using Twig templates. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Twig to version 3.26.0 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor advisory indicating the fix in 3.26.0. No other mitigations are specifically indicated.
CVE-2026-46639: CWE-693: Protection Mechanism Failure in twigphp Twig
Description
Twig versions from 3.24.0 up to but not including 3.26.0 contain a protection mechanism failure where sandbox policy checks are disabled during object-destructuring assignment. This allows an attacker with write access to a sandboxed Twig template to read public properties or invoke public getters on objects passed to the template engine. The issue is fixed in version 3.26.0.
CVSS v4.0
Score 7.1high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Twig (CVE-2026-46639) arises from the CoreExtension::getAttribute() method being compiled with the sandbox argument hardcoded to false during object-destructuring assignment in versions 3.24.0 through 3.25.x. This disables property and method policy checks intended to enforce sandbox restrictions, enabling an attacker with write access to a sandboxed template to access public properties or invoke public getters on objects. This represents a protection mechanism failure (CWE-693). The vulnerability is resolved in Twig version 3.26.0.
Potential Impact
An attacker who can write to a sandboxed Twig template can bypass sandbox restrictions to read public properties or invoke public getters on objects passed to the template engine. This could lead to unauthorized information disclosure within the context of the application using Twig templates. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade Twig to version 3.26.0 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor advisory indicating the fix in 3.26.0. No other mitigations are specifically indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-15T20:11:54.584Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56aea268715ace4342b107
Added to database: 07/14/2026, 21:48:18 UTC
Last enriched: 07/21/2026, 22:46:09 UTC
Last updated: 08/28/2026, 22:52:11 UTC
Views: 65
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.