MAL-2026-6497

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-synced/MAL-2026-6497.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6497
Aliases
  • GHSA-3m37-26mh-fj77
Published
2026-06-26T02:51:34Z
Modified
2026-09-08T00:30:16Z
Summary
Malicious code in chai-as-synced (npm)
Details

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

Source: amazon-inspector (be17d22b28dc53ea46085190c1f5ff11ae16ce4b80539162d68c2ad2b224158e)

chai-as-synced@7.0.9 impersonates the pino logger: it ships pino's README, LICENSE, docs/, index.d.ts and lib/ file layout (proto.js, levels.js, redaction.js, transport.js, worker.js, tools.js, multistream.js) with pino's keywords (fast,logger,stream,json), while package.json declares an unrelated name and author (Robert King hello@jsonspack.com, bugs URL https://jsonspack.com/issues) and a boilerplate description unrelated to logging. index.js unconditionally executes require('./lib/config') at module top level. lib/config.js is not pino's config module; it is a ~4MB single-line obfuscator.io bundle (rotated string array of ~23,868 entries, hex-escaped identifiers, control-flow flattening, nested decoder functions) that auto-runs the moment any consumer imports the package. The package also declares axios ^1.10.0 as a runtime dependency although the visible wrapper (a no-op express middleware) has no HTTP use, positioning the hidden payload to perform network I/O at import. The combination of deceptive identity, hidden obfuscated payload, import-time auto-execution, and a bundled HTTP client is a covert-code-execution shape inconsistent with any legitimate logging library.

Source: ghsa-malware (40194d8b76beed1c302e92600d56ab077089dc5db4790851e20326587ebc7f3d)

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": "IN-MAL-2026-007582",
            "import_time": "2026-06-26T03:14:43.456153823Z",
            "modified_time": "2026-06-26T02:51:34Z",
            "sha256": "7bc0ee3e6a8341e046b84880f9faf0a4750f4a261a791b95d1267066d7828071",
            "source": "amazon-inspector",
            "versions": [
                "6.0.3"
            ]
        },
        {
            "id": "IN-MAL-2026-018633",
            "import_time": "2026-08-24T16:49:13.730295019Z",
            "modified_time": "2026-08-24T16:39:42Z",
            "sha256": "be17d22b28dc53ea46085190c1f5ff11ae16ce4b80539162d68c2ad2b224158e",
            "source": "amazon-inspector",
            "versions": [
                "7.0.9"
            ]
        },
        {
            "id": "GHSA-3m37-26mh-fj77",
            "import_time": "2026-09-08T00:15:10.013442648Z",
            "modified_time": "2026-09-07T16:22:59Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "40194d8b76beed1c302e92600d56ab077089dc5db4790851e20326587ebc7f3d",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / chai-as-synced

Package

Name
chai-as-synced
View open source insights on deps.dev
Purl
pkg:npm/chai-as-synced

Affected ranges

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

Affected versions

6.*
6.0.3
7.*
7.0.9

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "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",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "package.json",
            "sha256": "3653595b1ec1c3c78d9489b77c5cc5f43370481807db71b2873d78cc1be56896",
            "tlsh": "6e019c60ce788e2304ed25824c2a064376619c13a928fc1932db512c0f9d5bf05ff26d"
        },
        {
            "path": "lib/initializeCaller.js",
            "sha256": "2a41c6b7c5e256d70f884c613c6412ef73d86f8cd8a65afe6afb64fabaf4e022",
            "tlsh": "f111008d61fc200c056512e6b22f18116022e4273d4ad4e47adc83470f9627fbd536df"
        },
        {
            "path": "index.js",
            "sha256": "1f51184c197102444a2c8a23e4a8e54a6479750420512922fcb5d5f795c33911",
            "tlsh": "0f318545b5f21259126d98c4f6b4a5263cdf9437331b76b1cded93952bce2080032bc7"
        }
    ],
    "package_integrity": [
        {
            "filename": "chai-as-synced-6.0.3.tgz",
            "hashes": {
                "sha1": "23bd6fe3dd5432840fef212a69140478da55c017",
                "sha512_sri": "sha512-+p9JYFO2tMYylZTW6b71Y9N5u5sGHtz31+ampp7X86TOfJtSJZ/L2yoIKc7u/VW2zzWmkQPNiXD0N3ENL6vtxQ=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-synced/MAL-2026-6497.json"