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4 vulnerabilities by tinylibs
CVE-2026-104849 (GCVE-0-2026-104849)
Vulnerability from nvd – Published: 2026-10-02 16:17 – Updated: 2026-10-02 16:17
VLAI
EPSS
VEX
Title
Tinypool: Prototype Pollution Gadget to RCE in run() options
Summary
Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.2, Tinypool reads filename from a caller-supplied options object in pool.run(task, options) without requiring an own property, so a polluted Object.prototype.filename can replace the intended worker module. Applications are affected only when they pass their own second-argument options object to pool.run(); calls without that argument use the trusted default options object. An attacker who can first pollute the prototype can cause the worker pool to load attacker-selected JavaScript and can read or modify task data with the host process's privileges. This issue is fixed in version 2.1.2.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinylibs/tinypool/security/adv… | x_refsource_CONFIRM |
| https://github.com/tinylibs/tinypool/pull/135 | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/commit/f4141… | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/releases/tag… | x_refsource_MISC |
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}
],
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"subAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
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}
]
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"discovery": "UNKNOWN"
},
"title": "Tinypool: Prototype Pollution Gadget to RCE in run() options"
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CVE-2026-104848 (GCVE-0-2026-104848)
Vulnerability from nvd – Published: 2026-10-02 16:15 – Updated: 2026-10-02 17:29
VLAI
EPSS
VEX
Title
Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution
Summary
Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.1, Tinypool constructs ThreadPool.options from a normal options object and reads the execArgv and env worker options in dist/index.js, allowing values inherited from a polluted Object.prototype to be copied into own properties and passed to worker_threads.Worker. An attacker who can first pollute either property can cause each newly spawned worker to load attacker-selected JavaScript through command-line preload arguments or NODE_OPTIONS, resulting in code execution with the host process's privileges and possible access to CI secrets, signing material, or build artifacts. This issue is fixed in version 2.1.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 17:29 UTC
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinylibs/tinypool/security/adv… | x_refsource_CONFIRM |
| https://github.com/tinylibs/tinypool/pull/134 | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/commit/24df4… | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/releases/tag… | x_refsource_MISC |
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}
],
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CVE-2026-104849 (GCVE-0-2026-104849)
Vulnerability from cvelistv5 – Published: 2026-10-02 16:17 – Updated: 2026-10-02 16:17
VLAI
EPSS
VEX
Title
Tinypool: Prototype Pollution Gadget to RCE in run() options
Summary
Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.2, Tinypool reads filename from a caller-supplied options object in pool.run(task, options) without requiring an own property, so a polluted Object.prototype.filename can replace the intended worker module. Applications are affected only when they pass their own second-argument options object to pool.run(); calls without that argument use the trusted default options object. An attacker who can first pollute the prototype can cause the worker pool to load attacker-selected JavaScript and can read or modify task data with the host process's privileges. This issue is fixed in version 2.1.2.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinylibs/tinypool/security/adv… | x_refsource_CONFIRM |
| https://github.com/tinylibs/tinypool/pull/135 | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/commit/f4141… | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/releases/tag… | x_refsource_MISC |
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"vendor": "tinylibs",
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CVE-2026-104848 (GCVE-0-2026-104848)
Vulnerability from cvelistv5 – Published: 2026-10-02 16:15 – Updated: 2026-10-02 17:29
VLAI
EPSS
VEX
Title
Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution
Summary
Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.1, Tinypool constructs ThreadPool.options from a normal options object and reads the execArgv and env worker options in dist/index.js, allowing values inherited from a polluted Object.prototype to be copied into own properties and passed to worker_threads.Worker. An attacker who can first pollute either property can cause each newly spawned worker to load attacker-selected JavaScript through command-line preload arguments or NODE_OPTIONS, resulting in code execution with the host process's privileges and possible access to CI secrets, signing material, or build artifacts. This issue is fixed in version 2.1.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 17:29 UTC
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tinylibs/tinypool/security/adv… | x_refsource_CONFIRM |
| https://github.com/tinylibs/tinypool/pull/134 | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/commit/24df4… | x_refsource_MISC |
| https://github.com/tinylibs/tinypool/releases/tag… | x_refsource_MISC |
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"dataVersion": "5.2"
}