CWE-506
Allowed-with-ReviewEmbedded Malicious Code
Abstraction: Class · Status: Incomplete
The product contains code that appears to be malicious in nature.
553 vulnerabilities reference this CWE, most recent first.
GHSA-M4FQ-XH7W-JHFM
Vulnerability from github – Published: 2020-09-03 19:39 – Updated: 2021-10-01 21:00All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.
Recommendation
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.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "crytpo-js"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:57:34Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.\n\n\n## Recommendation\n\nAny 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.\n\nThe 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.",
"id": "GHSA-m4fq-xh7w-jhfm",
"modified": "2021-10-01T21:00:29Z",
"published": "2020-09-03T19:39:46Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1391"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in crytpo-js"
}
GHSA-M5G8-CX2H-CVRH
Vulnerability from github – Published: 2026-08-21 03:31 – Updated: 2026-08-21 03:31The append-only-vec crate 0.1.9 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.
{
"affected": [],
"aliases": [
"CVE-2026-77650"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-21T01:17:01Z",
"severity": "CRITICAL"
},
"details": "The append-only-vec crate 0.1.9 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.",
"id": "GHSA-m5g8-cx2h-cvrh",
"modified": "2026-08-21T03:31:22Z",
"published": "2026-08-21T03:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77650"
},
{
"type": "WEB",
"url": "https://github.com/rustsec/advisory-db/issues/3161"
},
{
"type": "WEB",
"url": "https://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2026-0262.html"
},
{
"type": "WEB",
"url": "https://safedep.io/arrayref-proc-macro1-rust-build-time-malware"
},
{
"type": "WEB",
"url": "https://www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-M5P4-7WF9-6W99
Vulnerability from github – Published: 2020-09-01 21:10 – Updated: 2021-10-01 13:29All versions of regenrator are considered malicious. The package is malware designed to take advantage of users making a mistake when typing the name of a module to install. When executed, the package calls home to a Command and Control server to execute arbitrary commands.
Recommendation
This package was published to the npm Registry for a very short period of time. If you happen to find it in your environment you should revoke and rotate all credentials found on the compromised machine, as well as completely erase the affected machine and reinstall your Operating System.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "regenrator"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:32:43Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of `regenrator` are considered malicious. The package is malware designed to take advantage of users making a mistake when typing the name of a module to install. When executed, the package calls home to a Command and Control server to execute arbitrary commands.\n\n\n## Recommendation\n\nThis package was published to the npm Registry for a very short period of time. If you happen to find it in your environment you should revoke and rotate all credentials found on the compromised machine, as well as completely erase the affected machine and reinstall your Operating System.",
"id": "GHSA-m5p4-7wf9-6w99",
"modified": "2021-10-01T13:29:07Z",
"published": "2020-09-01T21:10:53Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/685"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in regenrator"
}
GHSA-M662-56RJ-8FMM
Vulnerability from github – Published: 2025-09-11 14:24 – Updated: 2025-09-11 14:24Impact
Npm users of PUC 1.17.3 or PUC latest were briefly affected by crypto-related malware detailed in the blog post below. This includes the extremely popular jsdelivr hosting of this file.
Patches
We unpublished the version on npm.
Workarounds
This has already been unpublished. See Prebid.js 9 release notes for suggestions on moving off the deprecated workflow of using the PUC or pointing to a dynamic version of it. PUC users pointing to latest should transition to 1.17.2 ASAP to avoid similar attacks in the future.
References
https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "prebid-universal-creative"
},
"versions": [
"1.17.3"
]
}
],
"aliases": [
"CVE-2025-59039"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2025-09-11T14:24:37Z",
"nvd_published_at": "2025-09-09T23:15:37Z",
"severity": "CRITICAL"
},
"details": "### Impact\nNpm users of PUC 1.17.3 or PUC latest were briefly affected by crypto-related malware detailed in the blog post below. This includes the extremely popular jsdelivr hosting of this file. \n\n### Patches\nWe unpublished the version on npm.\n\n### Workarounds\nThis has already been unpublished. See Prebid.js 9 release notes for suggestions on moving off the deprecated workflow of using the PUC or pointing to a dynamic version of it. PUC users pointing to latest should transition to 1.17.2 ASAP to avoid similar attacks in the future.\n\n### References\nhttps://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack",
"id": "GHSA-m662-56rj-8fmm",
"modified": "2025-09-11T14:24:37Z",
"published": "2025-09-11T14:24:37Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/prebid/prebid-universal-creative/security/advisories/GHSA-m662-56rj-8fmm"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59039"
},
{
"type": "PACKAGE",
"url": "https://github.com/prebid/prebid-universal-creative"
},
{
"type": "WEB",
"url": "https://www.sonatype.com/blog/npm-chalk-and-debug-packages-hit-in-software-supply-chain-attack"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Prebid-universal-creative latest on npm briefly compromised"
}
GHSA-M6Q2-9PFM-2WVR
Vulnerability from github – Published: 2020-09-03 17:02 – Updated: 2021-10-04 15:56All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.
Recommendation
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.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "wallet-address-vaildator"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:58:23Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.\n\n\n## Recommendation\n\nAny 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.\n\nThe 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.",
"id": "GHSA-m6q2-9pfm-2wvr",
"modified": "2021-10-04T15:56:06Z",
"published": "2020-09-03T17:02:49Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1412"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in wallet-address-vaildator"
}
GHSA-M6WH-M8M8-6XX5
Vulnerability from github – Published: 2018-08-06 20:05 – Updated: 2023-09-06 20:07The cofeescript package is a piece of malware that steals sensitive data such as a user's private SSH key and bash history, sending them to attacker controlled locations.
All versions have been unpublished from the npm registry.
Recommendation
If you have found cofeescript installed in your environment, you should:
1. Delete the package
2. Clear your npm cache
3. Ensure it is not present in any other package.json files on your system
4. Regenerate your SSH keys, registry credentials, tokens, and any other sensitive credentials that may have been present in your bash history.
Additionally, any service which may have been exposed via credentials in your bash history or accessible via your ssh keys, such as a database, should be reviewed for indicators of compromise as well.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "cofeescript"
},
"versions": [
"1.0.1"
]
}
],
"aliases": [
"CVE-2017-16202"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:45:11Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "The `cofeescript` package is a piece of malware that steals sensitive data such as a user\u0027s private SSH key and bash history, sending them to attacker controlled locations. \n\nAll versions have been unpublished from the npm registry.\n\n\n## Recommendation\n\nIf you have found `cofeescript` installed in your environment, you should:\n1. Delete the package\n2. Clear your npm cache\n3. Ensure it is not present in any other package.json files on your system\n4. Regenerate your SSH keys, registry credentials, tokens, and any other sensitive credentials that may have been present in your bash history.\n\nAdditionally, any service which may have been exposed via credentials in your bash history or accessible via your ssh keys, such as a database, should be reviewed for indicators of compromise as well.",
"id": "GHSA-m6wh-m8m8-6xx5",
"modified": "2023-09-06T20:07:33Z",
"published": "2018-08-06T20:05:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-16202"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-m6wh-m8m8-6xx5"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/541"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "cofeescript is malware"
}
GHSA-M794-QV59-GJ7C
Vulnerability from github – Published: 2020-09-03 17:03 – Updated: 2021-10-04 15:43All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.
Recommendation
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.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "signqle"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:58:19Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of this package contained malware. The package was designed to find and exfiltrate cryptocurrency wallets.\n\n\n## Recommendation\n\nAny 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.\n\nThe 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.",
"id": "GHSA-m794-qv59-gj7c",
"modified": "2021-10-04T15:43:26Z",
"published": "2020-09-03T17:03:22Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1410"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in signqle"
}
GHSA-M852-866J-69J8
Vulnerability from github – Published: 2020-09-01 20:47 – Updated: 2021-10-01 13:27Version 2.0.0 of eslint-config-airbnb-standard was published with a bundled version of eslint-scope that was found to contain malicious code. This code would read the users .npmrc file and send it's contents to a remote server.
Recommendation
The best course of action if you found this package installed in your environment is to revoke all your npm tokens and use a different version of the module. You can find instructions on how to do that here. https://docs.npmjs.com/getting-started/working_with_tokens#how-to-revoke-tokens
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "eslint-config-airbnb-standard"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.0"
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:32:19Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "Version 2.0.0 of `eslint-config-airbnb-standard` was published with a bundled version of `eslint-scope` that was found to contain malicious code. This code would read the users `.npmrc` file and send it\u0027s contents to a remote server.\n\n\n## Recommendation\n\nThe best course of action if you found this package installed in your environment is to revoke all your npm tokens and use a different version of the module. You can find instructions on how to do that here. https://docs.npmjs.com/getting-started/working_with_tokens#how-to-revoke-tokens\n",
"id": "GHSA-m852-866j-69j8",
"modified": "2021-10-01T13:27:58Z",
"published": "2020-09-01T20:47:01Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/675"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in eslint-config-airbnb-standard"
}
GHSA-M9R7-Q9FC-QWX5
Vulnerability from github – Published: 2020-09-03 17:22 – Updated: 2021-09-30 17:43All versions of maybemaliciouspackage contain malicious code. The package prints the system's SSH keys to the console as a postinstall script.
Recommendation
Remove the package from your environment. There are no further signs of compromise.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "maybemaliciouspackage"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-08-31T18:45:10Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "All versions of `maybemaliciouspackage` contain malicious code. The package prints the system\u0027s SSH keys to the console as a postinstall script.\n\n\n## Recommendation\n\nRemove the package from your environment. There are no further signs of compromise.",
"id": "GHSA-m9r7-q9fc-qwx5",
"modified": "2021-09-30T17:43:47Z",
"published": "2020-09-03T17:22:24Z",
"references": [
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/1042"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Malicious Package in maybemaliciouspackage"
}
GHSA-MC9X-V9XG-25PM
Vulnerability from github – Published: 2018-08-06 20:12 – Updated: 2023-09-12 18:43The coffescript package is a piece of malware that steals sensitive data such as a user's private SSH key and bash history, sending them to attacker controlled locations.
All versions have been unpublished from the npm registry.
Recommendation
If you have found coffescript installed in your environment, you should:
1. Delete the package
2. Clear your npm cache
3. Ensure it is not present in any other package.json files on your system
4. Regenerate your SSH keys, registry credentials, tokens, and any other sensitive credentials that may have been present in your bash history.
Additionally, any service which may have been exposed via credentials in your bash history or accessible via your ssh keys, such as a database, should be reviewed for indicators of compromise as well.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "coffescript"
},
"versions": [
"1.0.1"
]
}
],
"aliases": [
"CVE-2017-16205"
],
"database_specific": {
"cwe_ids": [
"CWE-506"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:45:52Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "The `coffescript` package is a piece of malware that steals sensitive data such as a user\u0027s private SSH key and bash history, sending them to attacker controlled locations. \n\nAll versions have been unpublished from the npm registry.\n\n\n\n## Recommendation\n\nIf you have found `coffescript` installed in your environment, you should:\n1. Delete the package\n2. Clear your npm cache\n3. Ensure it is not present in any other package.json files on your system\n4. Regenerate your SSH keys, registry credentials, tokens, and any other sensitive credentials that may have been present in your bash history.\n\nAdditionally, any service which may have been exposed via credentials in your bash history or accessible via your ssh keys, such as a database, should be reviewed for indicators of compromise as well.",
"id": "GHSA-mc9x-v9xg-25pm",
"modified": "2023-09-12T18:43:18Z",
"published": "2018-08-06T20:12:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-16205"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-mc9x-v9xg-25pm"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/542"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "coffescript is malware"
}
Mitigation
Remove the malicious code and start an effort to ensure that no more malicious code exists. This may require a detailed review of all code, as it is possible to hide a serious attack in only one or two lines of code. These lines may be located almost anywhere in an application and may have been intentionally obfuscated by the attacker.
CAPEC-442: Infected Software
An adversary adds malicious logic, often in the form of a computer virus, to otherwise benign software. This logic is often hidden from the user of the software and works behind the scenes to achieve negative impacts. Many times, the malicious logic is inserted into empty space between legitimate code, and is then called when the software is executed. This pattern of attack focuses on software already fielded and used in operation as opposed to software that is still under development and part of the supply chain.
CAPEC-448: Embed Virus into DLL
An adversary tampers with a DLL and embeds a computer virus into gaps between legitimate machine instructions. These gaps may be the result of compiler optimizations that pad memory blocks for performance gains. The embedded virus then attempts to infect any machine which interfaces with the product, and possibly steal private data or eavesdrop.
CAPEC-636: Hiding Malicious Data or Code within Files
Files on various operating systems can have a complex format which allows for the storage of other data, in addition to its contents. Often this is metadata about the file, such as a cached thumbnail for an image file. Unless utilities are invoked in a particular way, this data is not visible during the normal use of the file. It is possible for an attacker to store malicious data or code using these facilities, which would be difficult to discover.