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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-54059

CVE-2026-54059: 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-2026-54059] Denial of Service via crafted PCF font data

    CVE-2026-54059Source published Source updated

    Pillow is a Python imaging library. Prior to 12.3.0, PIL/PcfFontFile.py _load_bitmaps() read glyph dimensions from the PCF METRICS section and passed them directly to Image.frombytes() without calling Image._decompression_bomb_check(), allowing crafted PCF font data to cause excessive memory allocation. This issue is fixed in version 12.3.0. A remote attacker could exploit this vulnerability by providing specially crafted PCF font data. This data, when processed, can lead to excessive memory allocation because the library does not properly check for decompression bombs. The primary consequence is a Denial of Service (DoS), which could make the affected system or application unavailable. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness…

    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

    11 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

    16 more entries in the full advisory.

    Mitigation guidance
    • Do not load PCF fonts from untrusted sources. If PCF font loading is required, validate font file dimensions before passing them to Pillow, or upgrade to Pillow 12.3.0 or later which includes the fix for this vulnerability.
    Full advisory and evidenceOpen source bulletin

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