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CVE-2026-128083 Laravel: Task Output Injection - Concurrency Process

2.3 lowFix available

Low (2.3) in laravel framework. Fixed in laravel/framework 12.71.0, 13.40.0.

On this page
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.

Severity

CVSS 4.0

2.3 low
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
CWE
CWE-502 Deserialization of Untrusted Data
OWASP Top 10
A08:2025 Software or Data Integrity Failures
Published
Assigned by
GitHub_M (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
laravel framework>= 13.0.0, < 13.40.0
laravel framework< 12.71.0

Fix and patched versions

  • laravel/framework (Packagist): fixed in 12.71.0, 13.40.0

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-63hm-g96r-2m2qPackagistlaravel/framework<12.71.012.71.0
GHSA-63hm-g96r-2m2qPackagistlaravel/framework>=13.0.0 <13.40.013.40.0

Attack patterns (CAPEC)

  • CAPEC-586 Object Injection Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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