CVE Feed

    Dashboard / CVE / CVE-2026-45304

    CVE-2026-45304

    Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Yaml\Parser resolved YAML collection aliases recursively, allowing a small untrusted YAML input to expand into a multi-gigabyte structure and exhaust memory. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

    Published:Jul 14, 2026
    Last Modified:Jul 27, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00804
    CVSS Score:8.7

    Affected Products

    Vendor
    Symfony
    Product
    Symfony
    Vendor
    Symfony
    Product
    Yaml

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-197 Exponential Data Expansion

    Related CVEs

    CVE-2026-48761 (CVSS 5.3) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 u…
    CVE-2026-48747 (CVSS 6.3) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4…
    CVE-2026-48489 (CVSS 8.7) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4…
    CVE-2026-48760 (CVSS 5.3) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 u…
    CVE-2026-48736 (CVSS 6.9) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 t…
    CVE-2026-48784 (CVSS 5.1) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4…
    CVE-2026-45068 (CVSS 8.7) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4…
    CVE-2026-47212 (CVSS 6.9) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4…
    CVE-2026-45071 (CVSS 8.7) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4…
    CVE-2026-45755 (CVSS 6.9) — Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High