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    2 vulnerabilities by TehShrike

    CVE-2026-93753 (GCVE-0-2026-93753)

    Vulnerability from nvd – Published: 2026-09-18 17:51 – Updated: 2026-09-18 19:17
    VLAI
    Title
    deepmerge through 4.3.1 Prototype Poisoning via mergeObject
    Summary
    deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-18 19:16 UTC
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    TehShrike deepmerge Affected: 0 , ≤ 4.3.1 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-17 00:00
    Credits
    Wayde Shi (PayPal Cyber Security Team)
    Show details on NVD website
    To clipboard 

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    CVE-2026-93753 (GCVE-0-2026-93753)

    Vulnerability from cvelistv5 – Published: 2026-09-18 17:51 – Updated: 2026-09-18 19:17
    VLAI
    Title
    deepmerge through 4.3.1 Prototype Poisoning via mergeObject
    Summary
    deepmerge through 4.3.1 contains a prototype poisoning vulnerability in the mergeObject() function that fails to properly validate keys being written to target objects. Attackers can supply malicious source objects in merge operations to inject attacker-controlled properties into the returned object's prototype, causing applications to inherit unintended values when accessing properties without own-property checks.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-18 19:16 UTC
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    TehShrike deepmerge Affected: 0 , ≤ 4.3.1 (semver)
    		Create a notification for this product.
    Date Public
    2026-09-17 00:00
    Credits
    Wayde Shi (PayPal Cyber Security Team)
    Show details on NVD website
    To clipboard 

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