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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-55380

CVE-2026-55380: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-55380] Denial of Service via crafted GD 2.x image file

    CVE-2026-55380Source published Source updated

    Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted.gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0. A remote attacker could exploit this vulnerability by providing a specially crafted GD 2.x image file. The GdImageFile._open() function reads image dimensions without proper validation, leading to excessive memory allocation. This can result in a Denial of Service (DoS) due to C-heap exhaustion. A denial-of-service vulnerability was found in Pillow's GdImageFile plugin. The GdImageFile._open() function reads image dimensions from GD 2.x file headers and…

    Affected products in this advisory
    • Red Hat Ansible Automation Platform 2.5 for RHEL 8
    • Red Hat Ansible Automation Platform 2.5 for RHEL 9
    • Red Hat Ansible Automation Platform 2.6 for RHEL 9
    • Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    28 more entries in the full advisory.

    Source-reported affected versions
    • < 12.3.0
    Source-reported fixed versions
    • 12.3.0
    • python3.12-pillow-0:12.3.0-1.el8ap
    • python3.12-pillow-0:12.3.0-1.el9ap
    • python-pillow-0:5.1.1-22.el8_10

    46 more entries in the full advisory.

    Mitigation guidance
    • Avoid processing untrusted GD 2.x image files with PIL.GdImageFile.open(). Use Image.open() instead, which includes decompression bomb protections for supported formats. If GdImageFile must be used, validate the image dimensions before calling load(). Restricting accepted image formats at the application boundary to only those explicitly needed can reduce exposure.
    Full advisory and evidenceOpen source bulletin

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