UBUNTU-CVE-2026-45133
Symfony PHP framework versions prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12 contain a vulnerability where deeply nested mappings or sequences in attacker-controlled input cause recursive parsing without depth limits. This leads to exhaustion of the PHP stack and crashes the worker process. The issue has been fixed in the specified versions.
AI Analysis
Technical Summary
The Symfony PHP framework, used for web and console applications, has a vulnerability in its YAML parser where deeply nested mappings or sequences cause unbounded recursion in both block-level and inline parsers. This results in stack exhaustion and worker crashes when processing crafted documents. Versions prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12 are affected. The vulnerability is fixed in these versions.
Potential Impact
An attacker can cause denial of service by sending specially crafted input that triggers unbounded recursion in the YAML parser, exhausting the PHP stack and crashing the worker process. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Upgrade affected Symfony versions to 5.4.52, 6.4.40, 7.4.12, or 8.0.12 or later, where the issue is fixed. No other mitigation or temporary fix is indicated.
UBUNTU-CVE-2026-45133
Description
Symfony PHP framework versions prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12 contain a vulnerability where deeply nested mappings or sequences in attacker-controlled input cause recursive parsing without depth limits. This leads to exhaustion of the PHP stack and crashes the worker process. The issue has been fixed in the specified versions.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1+esm2?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu8+esm1?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]+dfsg-3ubuntu3+esm1?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]+dfsg-1?arch=source&distro=questingpkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Symfony PHP framework, used for web and console applications, has a vulnerability in its YAML parser where deeply nested mappings or sequences cause unbounded recursion in both block-level and inline parsers. This results in stack exhaustion and worker crashes when processing crafted documents. Versions prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12 are affected. The vulnerability is fixed in these versions.
Potential Impact
An attacker can cause denial of service by sending specially crafted input that triggers unbounded recursion in the YAML parser, exhausting the PHP stack and crashing the worker process. There is no indication of code execution or data leakage from the provided information.
Mitigation Recommendations
Upgrade affected Symfony versions to 5.4.52, 6.4.40, 7.4.12, or 8.0.12 or later, where the issue is fixed. No other mitigation or temporary fix is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-45133
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4ac68715ace43da935d
Added to database: 07/16/2026, 10:38:36 UTC
Last enriched: 07/16/2026, 12:46:41 UTC
Last updated: 07/16/2026, 12:46:41 UTC
Views: 2
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