Answer in brief
CVE-2026-128083 records a Low severity (CVSS 2.3) vulnerability in Laravel: Task Output Injection - Concurrency Process. The current sources do not mark it as known exploited. The current feed maps laravel/framework (composer), laravel/framework (composer), laravel/framework (composer), laravel/framework (composer) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 2.3. 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.
The current feed maps laravel/framework (composer), laravel/framework (composer), laravel/framework (composer), laravel/framework (composer) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| laravel/frameworkcomposer | >=13.0.0,<13.40.0 | 13.40.0 |
| laravel/frameworkcomposer | <12.71.0 | 12.71.0 |
| laravel/frameworkcomposer | >=13.0.0,<13.40.0 | 13.40.0 |
| laravel/frameworkcomposer | <12.71.0 | 12.71.0 |
| laravel/frameworkgeneric | >=13.0.0 <13.40.0 || <12.71.0 | 12.71.0, 13.40.0 |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
Laravel is a web application framework. Prior to 12.71.0 and 13.40.0, Laravel's Concurrency::run process driver can treat a forged internal result message in child standard output as framework output. An application route must invoke Concurrency::run, and a task must write attacker-controlled bytes at the start of the child's standard output that form a complete JSON document followed by gzip magic bytes. Under those application-specific conditions, an attacker can forge the internal result message and achieve remote code execution. The affected behavior is not exposed by default and requires application code that routes untrusted input into task output. This issue is fixed in versions 12.71.0 and 13.40.0.
Quoted source text, attributed separately from HOL analysis.