CVE-2026-104849

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Source
https://cve.org/CVERecord?id=CVE-2026-104849
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104849.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-104849
Aliases
  • GHSA-85c8-ppgw-ccpr
Published
2026-10-02T16:17:28Z
Modified
2026-10-04T02:46:02Z
Severity
  • 9.5 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
Summary
Tinypool: Prototype Pollution Gadget to RCE in run() options
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-1321",
        "CWE-94"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104849.json"
}
References

Affected packages

Git / github.com/tinylibs/tinypool

Affected ranges

Type
GIT
Repo
https://github.com/tinylibs/tinypool
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f41411a3e23324c674f35a19a3240f7a7c40ffbf
Fixed
5e18382a9aaa3344035905384b18a88a9da8c8bb
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.1.2"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.0.1
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.1.0
v0.1.1
v0.1.2
v0.1.3
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.3.0
v0.3.1
v0.4.0
v0.5.0
v0.6.0
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.9.0
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v2.*
v2.0.0
v2.1.0
v2.1.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104849.json"