CVE-2026-63501

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    CVE-2026-63501

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: ag-psd: Uncontrolled Memory Allocation in PSD Layer Decoding (totalMemoryLimit bypass)

    Details: ag-psd is a JavaScript library for reading and writing Photoshop Document files. Prior to 31.0.3, readPsd() accepts a totalMemoryLimit for parsing untrusted PSD files, but decodeLayerImageData expects a differently named memoryLimit property and therefore passes an undefined limit to createImageDataBitDepth. An attacker who can supply a PSD to an application with layer decoding enabled can use attacker-controlled layer dimensions to trigger an allocation larger than the configured limit, causing process memory exhaustion and denial of service. The advisory also identifies inflateSync(compressed) decompressing ZIP-encoded channel data without an output-size cap, which can cause a similar denial of service through unbounded decompression. This vulnerability is fixed in 31.0.1.

    References: https://github.com/Agamnentzar/ag-psd/releases/tag/31.0.3, https://github.com/Agamnentzar/ag-psd/security/advisories/GHSA-6w3r-6hpr-hp6p, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63501.json, https://nvd.nist.gov/vuln/detail/CVE-2026-63501, https://github.com/Agamnentzar/ag-psd/commit/57ea7d865238b6b7c8a2e976bcf2a77e03116e2f

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -e64f0c96a5b8f9ea7c79599d08bbcfc57345b781

    Affected versions

    30.2.0

    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
    CVE-2026-63501 | CVE-DB