MAL-2026-5310

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/regexp-ts/MAL-2026-5310.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-5310
Aliases
  • GHSA-5p9w-932r-cr5f
Published
2026-06-08T09:27:28Z
Modified
2026-06-12T20:01:56.499266961Z
Summary
Malicious code in regexp-ts (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (9828b4712ac404ec6f143f9c3115eb73ccd4418bab9cb17327ae325d488954e1)

regexp-ts masquerades as the pino logger (description, keywords, and module.exports.pino export) but is actually a remote-code-execution loader. When a consumer imports the package and invokes its middleware export, index.js unconditionally spawns lib/caller.js as a detached Node process. caller.js performs an HTTP GET to https://jsonkeeper.com/b/U2BTS, takes the cookie field of the JSON response, and runs it via new Function.constructor('require', s)(require) — executing arbitrary attacker-controlled JavaScript with full Node.js privileges and access to the host's require. Additional payload URLs (https://jsonkeeper.com/b/XRGF3 and https://jsonkeeper.com/b/4NAKK) are hidden as base64 strings in lib/const.js under cover names like DEV_API_KEY/DEV_SECRET_KEY to evade casual review. Because the payload host is a free anonymous JSON paste service, the executed code is mutable at any time without a package update.

Source: ghsa-malware (33f86b654ba85b8393a661095dbca749a30cc352525fa1712773654a8221e2e3)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "GHSA-5p9w-932r-cr5f",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "import_time": "2026-06-08T09:52:28.861721114Z",
            "modified_time": "2026-06-08T09:27:29Z",
            "sha256": "33f86b654ba85b8393a661095dbca749a30cc352525fa1712773654a8221e2e3"
        },
        {
            "id": "IN-MAL-2026-006184",
            "modified_time": "2026-06-12T19:10:48Z",
            "import_time": "2026-06-12T19:44:17.505672387Z",
            "source": "amazon-inspector",
            "sha256": "9828b4712ac404ec6f143f9c3115eb73ccd4418bab9cb17327ae325d488954e1",
            "versions": [
                "2.1.7"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / regexp-ts

Package

Name
regexp-ts
View open source insights on deps.dev
Purl
pkg:npm/regexp-ts

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.7

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "lib/caller.js",
            "tlsh": "c2017b4a30fa605c015510f64b1fe4317012e4173c49e5c5378c87514fea5ae6963eed",
            "sha256": "6e9c6643cf66d24db6350eb1c03d6f0f862243ee18ab557c9be20d847dff9f36"
        },
        {
            "path": "lib/const.js",
            "tlsh": "b9c08c8351f0684b04301bb3a50ca991f2a1d26f0884160231f564844b396a92848fb7",
            "sha256": "d10853dde92fdc48d8cb5505d89e0030fd35e1416a16a820fe5ec4aceef01c4f"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/regexp-ts/MAL-2026-5310.json"