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    4 vulnerabilities found for stablelib by StableLib

    CVE-2026-106448 (GCVE-0-2026-106448)

    Vulnerability from nvd – Published: 2026-10-06 19:45 – Updated: 2026-10-07 17:07
    VLAI
    Title
    StableLib: Prototype poisoning via `__proto__` map keys in CBOR decoding
    Summary
    StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor CBOR map decoding path creates ordinary JavaScript objects and assigns attacker-controlled keys with bracket assignment. A map key named __proto__ invokes the inherited prototype setter instead of creating an ordinary own property, allowing the decoded object's prototype to contain attacker-controlled authorization or feature-flag values. Downstream code that trusts normal property lookup or merges the decoded object can therefore make security-sensitive decisions using inherited attacker data. This issue is fixed in version 2.0.4.
    Severity
    8.9 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-07 15:27 UTC
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    StableLib stablelib Affected: < 2.0.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-106447 (GCVE-0-2026-106447)

    Vulnerability from nvd – Published: 2026-10-06 19:44 – Updated: 2026-10-07 14:40
    VLAI
    Title
    StableLib: Stack exhaustion denial of service via deeply nested CBOR arrays, maps, or tags
    Summary
    StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor decoder recursively processes nested CBOR arrays, maps, and tags through _decodeValue() without enforcing a maximum nesting depth. A sufficiently deep structure exhausts the JavaScript call stack, causing a decoding exception and potentially terminating an uncaught request worker or process. This issue is fixed in version 2.0.4.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-07 14:39 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    StableLib stablelib Affected: < 2.0.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-106448 (GCVE-0-2026-106448)

    Vulnerability from cvelistv5 – Published: 2026-10-06 19:45 – Updated: 2026-10-07 17:07
    VLAI
    Title
    StableLib: Prototype poisoning via `__proto__` map keys in CBOR decoding
    Summary
    StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor CBOR map decoding path creates ordinary JavaScript objects and assigns attacker-controlled keys with bracket assignment. A map key named __proto__ invokes the inherited prototype setter instead of creating an ordinary own property, allowing the decoded object's prototype to contain attacker-controlled authorization or feature-flag values. Downstream code that trusts normal property lookup or merges the decoded object can therefore make security-sensitive decisions using inherited attacker data. This issue is fixed in version 2.0.4.
    Severity
    8.9 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-07 15:27 UTC
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    StableLib stablelib Affected: < 2.0.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-106447 (GCVE-0-2026-106447)

    Vulnerability from cvelistv5 – Published: 2026-10-06 19:44 – Updated: 2026-10-07 14:40
    VLAI
    Title
    StableLib: Stack exhaustion denial of service via deeply nested CBOR arrays, maps, or tags
    Summary
    StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor decoder recursively processes nested CBOR arrays, maps, and tags through _decodeValue() without enforcing a maximum nesting depth. A sufficiently deep structure exhausts the JavaScript call stack, causing a decoding exception and potentially terminating an uncaught request worker or process. This issue is fixed in version 2.0.4.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-07 14:39 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    StableLib stablelib Affected: < 2.0.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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          "url": "https://github.com/StableLib/stablelib/releases/tag/@stablelib/cbor@2.0.4"
        }
      ],
      "source": {
        "advisory": "GHSA-5jg4-p4qw-cgfr",
        "discovery": "UNKNOWN"
      },
      "title": "StableLib: Stack exhaustion denial of service via deeply nested CBOR arrays, maps, or tags"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-106447",
    "datePublished": "2026-10-06T19:44:03.028Z",
    "dateReserved": "2026-10-06T16:49:40.590Z",
    "dateUpdated": "2026-10-07T14:40:22.293Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}